Answer the following question given this paragraph: 

The vertebral column is the core of the vertebrate endoskeleton, or internal skeleton. You can see a human skeleton as an example of the vertebrate endoskeleton in Figure below . In addition to the vertebral column, the vertebrate endoskeleton includes:.


Q: The vertebrate endoskeleton can also be called what?

 Choices:

- structural skeleton

- exoskeleton

- deep skeleton

- internal skeleton

A:
internal skeleton
