The phrase "a risky activity" is correct and usable in written English.
You can use it to describe an action or task that involves a significant chance of loss, harm, or danger.
Example: "Skydiving is considered a risky activity due to the potential for equipment failure."
Alternatives: "a hazardous endeavor" or "a dangerous pursuit".
This was a risky activity.
This is a risky activity, even in the safest labs.
"The more you do a risky activity at a high level, the more likely you are to get hurt".
Some people even put a negative price on their lives -- when, for instance, they pay money to engage in a risky activity like mountain climbing.
Commercial real estate (CRE) lending is a risky activity that still dominates the business model of many modestly capitalized small and medium-sized banks.
Despite liberalisation, protesting remains a risky activity in Burma, yet the anti-boat people protest was readily given permission, and they marched through streets conveniently cleared of traffic.
Students will comply with local laws and not engage in any risky activity outside the activities described in this program.
Yes, sex can be a potentially risky activity for a woman, but I was in a fairly closed social circle, shagging colleagues and friends of friends, and for me, at least, it was less dangerous than riding a bicycle around town: I was still very shaky on the difference between "left" and "right", didn't understand the Highway Code and often got distracted if a pigeon flew past.
For instance, a significant reduction in the number of appropriately trained workers performing an inherently risky activity in an industrial setting combined with a demand to meet significantly accelerated production goals can generally be expected to result in diminished workplace safety.
While safe and dignified burials are conducted in a culturally sensitive manner, they are still a very risky activity that can only be done consistently at a large scale by trained staff.
Looting was seen as a less risky activity than rioting: "Looting tends to involve a wider range of people – children, women, older people – because it does not involve physical violence.
