Q: One of the main features all vetebrates have in common is what?


Read this paragraph and choose the correct option from the provided answers:

Vertebrates. From the smallest of fish to us. One of the main features we all have in common is our backbone. The Vertebrates chapter describes the biological features of fish, amphibians, reptiles, birds, and mammals.

 Choices:

- hard shell

- brain

- skeleton

- backbone


A:
backbone