Fact 1: Mammals breathe with the help of a diaphragm.

Fact 2: Common dolphins are mammals.

Given the two facts above, answer the question "What does a diaphragm help a dolphin do?" with the following options: 
- swimming
 - rest
 - stay warm
 - smell
 - see
 - breathe
 - eat
 - survive


 

      breathe   