Answer:
Cohort study
Explanation:
A cohort study is a longitudinal studio (which mean a group is observed through time) where the sample is a cohort (people who share some characteristics) and they are used to identify factors that might contribute to a particular condition, illness or disease.
In this case, the sample was made of people who <u>shared a common characteristic: being volleyball players</u>. This study was used to identify how <u>the use of sunscreen would affect the skin in terms of damage.</u>
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Therefore, we can say that this is an example of cohort study.
Answer:
Knowing others is intelligence;
knowing yourself is true wisdom.
Mastering others is strength;
mastering yourself is true power.”
― Lao Tzu, Tao Te Ching
