The answer is C is b/c sun exposure is completely natural unlike the followin answers.
Net ball.
net ball: a ball that on the service (as in tennis and volleyball) strikes the top of the net and lands in the service court but must be served over.
Answer:
C. proteins
Explanation:
Just got it right on edge
The Institute of Medicine recommends 13 (3 liters) cups of water (and other beverages) each day for men and 9 (2.2 liters) cups of water (and other beverages) each day for women.