You are presented with the question "what are endothermic tetrapod vertebrates?" and the following answer choices: 
- mammals
 - clouds
 - humans
 - penguins
 - jellyfish
 - warm-blooded
 - fur and fat
 - animals

Now knowing that birds are endothermic tetrapod vertebrates and penguins are a type of birds, choose the best answer.


 

    penguins     