Concept:The central nervous system (CNS) is the main control center of the body. It processes information and sends commands.
Explanation:The nervous system is divided based on location into two parts: CNS and peripheral nervous system (PNS).
The CNS includes the brain and the spinal cord.
The brain handles thinking, memory, and voluntary movements.
The spinal cord carries messages between the brain and the rest of the body.
The PNS connects the CNS to all other body parts, but it is not part of the CNS.
Therefore, the CNS consists of both the brain and the spinal cord, not just one of them.
Answer:D. brain and spinal cord
