a mouse pushing a lever to release food a dog going to a food bowl when a bell rings students receiving star stickers for good behavior the brain signaling blood vessels to return to normal
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which situation is an example of a feedback system in the body that maintains homeostasis?
Possibilities:
- a mouse pushing a lever to release food
- a dog going to a food bowl when a bell rings
- students receiving star stickers for good behavior
- the brain signaling blood vessels to return to normal

the brain signaling blood vessels to return to normal