What is your basal metabolism? how does this influence a person's likelihood to gain weight?

Your basal metabolism is the number of calories required to keep your body functioning at rest. People who weigh more are more likely to have a faster basal metabolic rate.

be confident on yourself. ignore such fools and move on ; )

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.