You are presented with the quiz "Mammals find breath through the action of what thing beneath their lungs?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "mammals breathe with the help of a diaphragm" and "hiccups are caused by involuntary spasms of the diaphragm, the muscle beneath the lungs". 

So, what's the best answer to the question?


 

   muscle        