You are presented with the question "What kind of animal is classified as having a vertebrae?" and the following answer choices: 
- it keeps an organism warm
 - invertebrate
 - vertebrate chordate
 - gastropod shells
 - the body's largest organ
 - remains of prehistoric life
 - hard boned animals
 - roundworm

Now knowing that vertebrate chordates have a backbone and invertebrates have no vertebrae or backbone, choose the best answer.


 

   vertebrate chordate      