Not sure if I'm correct but my best guess is the cell membrane seeing as it surrounds the cell itself and is responsible for allowing certain molecules to diffuse in or out of the cell. Good Luck! :)
The feedback loops communicate with the body to ensure homeostasis.
Answer is A. Feedback Loops
It will help you
Have a great day
It would stay the same because they equal levels of water. So ig the answers would be Move and out of the cell equally.