People aged 15 to 24 account for of all people infected by stis.
a. more than a quarter
b. less than half
c. more than half
d. less than a quarter

a lack of sleep can affect body weight. two hormones in the body, leptin and ghrelin, control feelings of hunger and satiety, or fullness.

explanation:

relationship between pressure and air volume and led to the understanding of how respiration works; i believe this is the correct answer ; /// good luck