Pick from:
(A). mammals
(B). tortoises
(C). dogs
(D). chickens
(E). ducks
(F). humans
(G). crocodiles
(H). animals

Fact 1: Mammals breathe with the help of a diaphragm. Fact 2: Belly breathing uses the diaphragm, which helps relax the lungs. Given the two facts above, what breathes by relaxing the lungs?
Answer:
(A).