You are presented with the question "Vertebrates are animals that have what?" and the following answer choices: 
- major threat to health
 - the digestive system
 - characteristics
 - a three chambered heart
 - moving bones and joints
 - scales on their skin
 - a vertebrate column
 - aerobic capacity

Now knowing that vertebrates are animals that have a backbone and all vertebrates have a backbone or vertebral column, choose the best answer.


 

       a vertebrate column  