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:
Southern Africa I believe
<span>The USSR was made up of 15 countries. Out of them, the "Russian Republic" was the largest, making of 75% of the area and 50% of the population.</span>
Invasions by Barbarian tribes
