Fact 1: An animal requires air for survival.

Fact 2: Mammals are animals with lungs, and they breath air.

Given the two facts above, answer the question "How do animals lungs help them survive?" with 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  