populations are those people who lack the ability to make informed decisions based on specific situations and circumstances.

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.

what are the options that have to match them to?

hmmm

true, i think.

i checked and it seems the answer is, true.