An animal is a vertebrate. It is warm-blooded and has feathers on its body. Which class does it belong to?

A. Reptilia

B. Aves

C. Mammalia

If the animal is a vertebrate, warm blooded, and has feathers on its body it belongs to the Aves class. In the Aves class, they have feathers, beak, no teeth, winged, and two legged, etc. The correct answer is B.

As we know that Aves is the latin name for the birds - they have feathers, winged on their body they are warm-blooded, egg-laying vertebrate animals with evolutionary origins among the reptiles. So the answer is B.