Allowing the body to "fix" itself
It wants to be healthy and it works to reach it.
example: shiver when cold. sweat when hot
Heart and lungs works hand in hand. Not only that they are close to each other but they also work to make sure that body gets enough oxygen that it needs to live. It is the heart that pumps blood through the body it passes through the lungs. then it is the job of the lungs to supply oxygen together with the blood that heart pumps.
Answer:
the answer would be B. Digestive system, Muscular system, endocrine system, nervous system