Which statement is TRUE about the factors affecting physical fitness?
A. We have no control over any of the factors.
B. We have total control over all the factors.
c. The factors that affect physical fitness only apply to athletes
D. We can control some of the factors, but not all of them.
Please select the best answer from the choices provided.

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.