a, because exercise doesn't just aid the prevention of certain diseases, it helps prevent many diseases. i would've chosen d if it wasn't so specific but a is the correct answer.
False, the amount of sleep your body gets will very much so effect your day. Sleep allows the brain and body to rest and grow, we need sleep to perform tasks throughout the day.
Depends on what question it is.
Answer:
survival advantage, against malaria fatality
Explanation:
