Which statement best describes the relationship of the central nervous system to behavior?

• A. It comprises the brain and spinal cord, coordinating responses.
• B. It consists only of the brain's cortex.
• C. It is primarily the peripheral nerves that drive behavior.
• D. It is not involved in musical perception.

Answer: (A)

The main idea here is that behavior comes from the central nervous system, which includes the brain and spinal cord, working together to process information and coordinate responses. The brain handles interpreting what we sense, planning actions, and issuing commands to muscles. The spinal cord acts as a rapid conduit for signals between the brain and the body, supporting reflexes and helping to relay information for voluntary movement. The peripheral nerves carry sensory input and motor commands to and from the CNS, but they don’t organize behavior by themselves—the coordination and integration happen inside the CNS.

In the context of music, you’re seeing this in action: auditory information is processed by brain regions, memories and expectations influence perception, and motor areas plan and execute movements to produce music. The cortex is important, but it’s not the entire story—subcortical structures also contribute to timing, coordination, and emotion. So the statement that best describes the relationship is that the brain and spinal cord coordinate responses, forming the basis of behavior.