What is a function if the backbone in animals?
A. it protects against predators
B. It regulated blood glucose
C. It surronds the spinal cord
D. It limits movements

The answer is C.

Explanation:

Don't forget that the human skeleton or backbone protects delicate organ such as the heart and lungs, which are protected by the ribs. It also protects structures such as the spinal cord, which is protected by the vertebral column.

substitution is the answer in this case