This is for animal science

muscular

Explanation: exoskeleton is not the answer because it's skeletons on the outside of the body for example flies have exoskeleton

skeletal is the bones remember we're focusing on the meat

excretory system discharges waste and we're looking for reproduction

whic leaves us left with muscular and the reason that's our answer is because when you exercise your muscles break down, when you go to sleep in other terms rest, our muscles regenerate even bigger and stronger, in simpler terms more healthier muscle is produced

you need to provide the