Genetics primarily causes similarities in bmi and body size between family members. influences what color your finger nail polish is has nothing to do with your height or weight. none of the above.

The correct answer that will complete this sentence is:

Genetics primarily causes similarities in BMI and body size between family members. 

Genetics is the study of hereditary characteristics, properties, or features and their variations. It explains why members of the same family share the same physical features or behavior.

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.