During puberty, the cephalocaudal growth trend of infancy and childhood reverses. the torso accelerates first, followed by the hands, legs, and feet. the average child gains 20-35 pounds. girls' shoulders broaden relative to the hips.

During puberty, the cephalocaudal growth trend of infancy and childhood reverses. During this stage, the hands, legs and feet accelerates first, reversing the cephalocaudal growth trend of infancy and childhood. Cephalocaudal growth refers to the pattern of changing spatial proportions over time during growth. An example is the gradual change in head size relative to the size of the body. 

Bis the correct answer.

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.