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

Fact 2: Hiccups are caused by involuntary spasms of the diaphragm, the muscle beneath the lungs.

Given the two facts above, answer the question "Mammals find breath through the action of what thing beneath their lungs?" with the following options: 
- matter
 - the skin
 - muscle
 - organ
 - lmestone
 - oxygen
 - gas
 - Epidermis


 

   muscle      