Question

In mammals the powerful muscle that aids in breathing is the A. diaphragm. B. kidney. C. cerebrum. D. placenta.

Answer 1

In mammals, the powerful muscle that aids in breathing is the diaphragm. This muscle expands and contracts the chest cavity and forces air in and out of the lungs.
Hope that helped =)

Answer 2

The diaphragm is the powerful muscle that aids in breathing. 

Hope this helped! Have a nice day!