An animal requires air for survival, and mammals are animals with lungs, and they breath air. Given these facts, how do animals lungs help them survive among the following options:
- they body they live in
 - compound of hydrogen oxygen
 - They help them drink water
 - it keeps an organism warm
 - They help them sleep
 - prevents the transfer of heat
 - They help them breathe
 - They help them eat


 

       They help them breathe  