You are presented with the question "What do mammals use a diaphragm for?" and the following answer choices: 
- movement
 - Movement of an air mass
 - Pumping water
 - survival
 - Preventing death
 - To keep their body heat.
 - Shaving cats
 - Making friends

Now knowing that mammals breathe with the help of a diaphragm and when a person stops breathing, they die, choose the best answer.


 

     Preventing death    