Matter  is a. the amount of energy contained within an objectb. a measure of the force gravity exerts on objectsc. something that has mass and occupies spaced. a measure of an object's inertial force

C. something that has mass and occupies space. Mass is anything and everything you can think of that takes up space. Hope this helps ;)

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.