Increasing heart rate, blood flow to muscles, body temperature and increasing fluid around joints are benefits of a cool-down
O intense exercise
O warm-up
static stretch

C

Explanation:

When your heart rate speeds up, you usually get hotter and start sweating, when you are exercising. This might take hours for you to realize because it happens so slowly. Fluid flows and your bloodstream goes a lot smoother, which can help lower the chances of blood clots. This is all because of a warm-up.

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.