Birds are endothermic tetrapod vertebrates, and bird A bird is an animal with feathers. Given these facts, what is an endothermic tetrapod vertebrates among the following options:
- warm-blooded
 - passenger pigeons
 - remains of prehistoric life
 - Humans
 - An animal with feathers.
 - All animals with vertebrae.
 - Dogs.
 - They have thick fur


 

     An animal with feathers.    