Question

the spinal cavity protects which organ brain heart lungs spinal cord

Explanation:

The spinal cavity is a part of the dorsal body cavity and its main function is to house and protect the spinal cord. The brain is protected by the cranial cavity, the heart is in the thoracic cavity and protected by the rib - cage, and the lungs are also in the thoracic cavity.

Answer:

D. spinal cord