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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
which describes why
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "which describes why" is correct and usable in written English.
It can be used when you want to introduce an explanation or reasoning behind a statement or situation. Example: "The report includes a section which describes why the project was delayed due to unforeseen circumstances."
✓ Grammatically correct
Science
News & Media
Wiki
Alternative expressions(20)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
1 human-written examples
Some of these systems provide the end user not only with such a personalized item list but also with an explanation which describes why a specific item is recommended and why the system supposes that the user will like it.
Human-verified similar examples from authoritative sources
Similar Expressions
59 human-written examples
Also discovered was a racist "manifesto" which described why he had decided to launch the attack.
News & Media
The next question asked which choice "best describes why you are comfortable diagnosing death based on the criteria of brain death?" Most (133, 69%; 62-75%) responded that "the conceptual basis of brain death makes it equivalent to death of the patient".
Science
Dr Ryrie, historian of religion at Durham says: "The kind of personal statement that warms an admissions tutor's heart is the kind which is honest: which describes, in genuinely personal terms, quite why the student loves the subject, and conveys something of their passion for it".
News & Media
Appraisal theory, which describes the intrapsychic processes that explain why two people experiencing the same event may have completely different emotional reactions to it [ 14- 16], suggests that the objective degree of exposure to a stressor and the subsequent subjective distress are relatively independent of each other.
Science
She initiated a difficult conversation with her supervisor at her non-profit development job, in which she described why she was thinking of leaving.
News & Media
Why? Influence is that delicate concept which describes or predicts the behaviour embedded in these trillions of connections.
News & Media
Self-serving bias 2. Which of the following explanations describes why the amygdala would most likely be activated by the use of the I.A.T. in this study?
News & Media
Re "A Path Paved in Dreams, Not in Gold" (Executive Life, July 14), which described how and why for-profit corporate executives sometimes switch to the nonprofit sector: Such successful transitions are probably the exception, not the rule.
News & Media
He had watched a "Nova" program called "Why Planes Crash," which described a method known as "crew resource management," or C.R.M., which is used by commercial airlines and the military in pilot training.
News & Media
Try adverbs, which describe verbs.
Wiki
Expert writing Tips
Best practice
Use "which describes why" when you need to add a clause that explains the reason behind a preceding statement. It's particularly useful in formal writing to provide clear and logical connections between ideas.
Common error
Avoid using "that" when "which" is appropriate for nonrestrictive clauses. "Which" introduces additional, non-essential information, while "that" introduces essential information. Omitting "which" shouldn't change the core meaning of the sentence.
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "which describes why" functions as a relative clause introducing an explanation or reason. Ludwig confirms its correct usage. It connects a preceding statement with the explanation that follows, enhancing clarity.
Frequent in
News & Media
35%
Science
35%
Wiki
10%
Less common in
Formal & Business
10%
Academia
5%
Encyclopedias
5%
Ludwig's WRAP-UP
The phrase "which describes why" is a versatile tool for providing explanations and justifications in writing. Grammatically sound and frequently used, it effectively connects statements with their underlying reasons. As Ludwig AI confirms, it is correct. While alternatives like "that explains the reason" exist, "which describes why" offers a clear and logical flow, particularly suited for neutral to formal contexts like news articles, scientific reports, and professional documents. Be mindful of the restrictive vs. nonrestrictive clause distinction to ensure accuracy in usage.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
that explains the reason
Replaces "describes" with "explains" and explicitly states "the reason".
that clarifies the cause
Substitutes "describes why" with "clarifies the cause", focusing on a causal explanation.
which elucidates the rationale
Replaces "describes why" with the more formal "elucidates the rationale".
that details the justification
Uses "details the justification" instead of "describes why", emphasizing a formal explanation.
which indicates the reason
Employs "indicates the reason" as a more direct and less descriptive alternative.
that outlines the explanation
Replaces the verb "describes" with "outlines" and uses the noun "explanation"
that presents the reasoning
Swaps "describes why" for "presents the reasoning", offering a more structured tone.
which spells out the motive
Replaces "describes why" with "spells out the motive", highlighting intent.
that provides the background
Focuses on providing context or background information instead of direct explanation.
that accounts for the effects
Shifts the focus to the consequences and their causes rather than the reason itself.
FAQs
How can I use "which describes why" in a sentence?
Use "which describes why" to introduce a clause that explains the reason or cause behind something mentioned earlier in the sentence. For example, "The report includes a section "which describes why" the project was delayed due to unforeseen circumstances".
What are some alternatives to "which describes why"?
You can use alternatives like "that explains the reason", "that clarifies the cause", or "that details the justification" depending on the context.
Is it better to use "which describes why" or "that describes why"?
Use "which describes why" when the clause is nonrestrictive and adds extra information that isn't essential to the sentence's core meaning. Use "that describes why" for restrictive clauses that are essential to the meaning.
What's the difference between ""which describes why"" and "that explains why"?
""which describes why"" typically introduces a nonrestrictive clause, providing additional information. "That explains why" usually introduces a restrictive clause that is crucial to the sentence's meaning. The choice depends on whether the information is essential or supplemental.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested