If you want to make healthy choices, you need to A. learn about your body B. discuss your health with a doctor C. have a medical examination

I am 99% sure the answer is A-learn about your body

Explanation:

I hope this helps, can i plz have brainliest

fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.