It can be confusing because it isn't specific enough. In astronomy, the big dipper is not a spoon. It is a bear. Scientists know it as Ursa Major rather than a dipper or bear.
"Testes and Ovaries"
Two hormones are primarily responsible for pubic hair during puberty. Androgen and Estrogen, of which are spectively provided by the "Testes and Ovaries". Pubic hair is the bodies attempt of protecting those organs against friction with contact of skin.
ATP is an energy carrier that holds energy after processes like cellular respiration. The body can turn ATP into energy to do processes like physical movement later on.
Hope this helps :)
