The endocrine system.
It releases hormones from the glands; and also controls thirst, and sleep. Which is quite interesting.
Play games as a family, Went out to eat, Swimming in the pool, and hangout
Answer:
It's basically the percentage of body fat, muscle and bone. You can change it by exercising a lot (cardiovascular in particular), eating less calories (dieting) or just eating more healthy things/ more foods with protein.
Explanation:
I had a question like this on a health/pe test last week