You are presented with the question "What is an endothermic tetrapod vertebrates?" and the following answer choices: 
- warm-blooded
 - passenger pigeons
 - remains of prehistoric life
 - Humans
 - An animal with feathers.
 - All animals with vertebrae.
 - Dogs.
 - They have thick fur

Now knowing that birds are endothermic tetrapod vertebrates and bird A bird is an animal with feathers, choose the best answer.


 

     An animal with feathers.    