Fact 1: Birds are endothermic tetrapod vertebrates.

Fact 2: Penguins are a type of birds.

Given the two facts above, answer the question "what are endothermic tetrapod vertebrates?" with the following options: 
- mammals
 - clouds
 - humans
 - penguins
 - jellyfish
 - warm-blooded
 - fur and fat
 - animals


 

    penguins     