Question

In mammals the powerful muscle that aids in breathing is the

a. diaphragm.
b. kidney.
c. cerebrum.
d. placenta.

Answer 1

Diaphragm, as it is in you lungs.
Kidney doesn't not help in the breathing mechanic, as well as the cerebrum and placenta (which is more of a gluey substance when a in the uterus of a pregnant woman to give subtenants to her child).

Answer 2

a. diaphragm is the answer