The phrase "activity can have a" is correct and usable in written English.
It can be used when discussing the potential effects or outcomes of an activity.
Example: "Engaging in regular physical activity can have a positive impact on mental health."
Alternatives: "activity may result in a" or "activity can lead to a".
Physical activity can have a positive effect on self-esteem and physically active children tend to suffer from fewer mental health problems [ 24].
But solar activity can have a strong impact on the earth.
Regular activity can have a positive effect on our weight, mood, cardiovascular health, blood pressure, stress management and blood-sugar levels.
In addition, the emission behaviors of some inorganic ions indicate microbial activity can have a significant effect on leaching behavior, which cannot be neglected when researching landfill waste.
Leveson looked much wider than the reporting of politics, but one aspect of modern day political journalism, the focus on the private lives of politicians, is an area where (unlike most celebrity intrusions) detailing such private activity can have a public interest defence.
Fear or suspicion that ones speech is being monitored by a stranger, even without the reality of such activity, can have a seriously inhibiting effect upon the willingness to voice critical and constructive ideas. Presidents Commission on Law Enforcement and Administration of Justice, The Challenge of Crime in a Free Society 202 (1967).
This activity can have an impact on a product's appearance, user friendliness, ease of manufacture, efficient use of materials, functional performance, and so on.
Reasonable people will disagree over whether diaspora Jewish activity can have an impact on the course that Israeli society takes.
There is growing recognition that environmental conditions and policies that promote physical activity can have an impact on modifiable behavioral risks and chronic conditions (9, 10).
This study confirms previous reports of a significant inverse association of physical activity and colon adenoma, and suggests that physical activity can have an important role in colon cancer prevention.
The new physical activity guidelines "Start Active Stay Active" published by the Chief Medical Officers in the UK [ 12] state that participation in physical activity can have an important role in promoting mental health and well-being.
