B,C,D are the correct answer
No, it's because we need to breathe. Your body needs oxygen. Air pressure has little to nothing to do with it as far as I know.
Answer:
B
Explanation:
the water will be out of the chest after pushing it and the breath will alow the person to breath back!
It is false because the marking depends where you should stop
It is cell wall because the cell wall keeps it safe.
