Fact 1: Birds are endothermic tetrapod vertebrates.

Fact 2: Animals with backbones are called vertebrates.

Given the two facts above, answer the question "Which animal has a backbone?" with the following options: 
- camels
 - snail
 - bats
 - cricket
 - a fish
 - bird
 - koalas
 - octopus


 

      bird   