You are presented with the question "How do animals lungs help them survive?" and the following answer choices: 
- 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

Now knowing that an animal requires air for survival and mammals are animals with lungs, and they breath air, choose the best answer.


 

       They help them breathe  