If animals in the class aves are endothermic tetrapod vertebrates, then what kind of animal would be an endothermic tetrapod vertebrate?

Answer choices:
- animals in the class aves
 - barks and snarls
 - passenger pigeons
 - Something that is self-aware
 - Generating heat
 - retaining heat
 - absorb light energy
 - it keeps an organism warm

 

 animals in the class aves         