The two main divisions of the nervous system are the central nervous system and the:

The correct response identifies the peripheral nervous system as the second main division of the nervous system, alongside the central nervous system. The central nervous system comprises the brain and spinal cord, serving as the control center for processing information and coordinating activity throughout the body.

In contrast, the peripheral nervous system includes all the neural elements outside of the central nervous system. It functions to connect the central nervous system with limbs and organs, providing a pathway for signals to travel to and from the body. This system is critical for sensory and motor functions, allowing for the necessary communication between the body and brain, which enables responses to stimuli and regulatory actions such as movements and reflexes. The distinction between these two systems highlights the organization of the nervous system in managing and facilitating bodily functions and responses.

The terminology in the other options does not pertain to recognized categories of the nervous system, making them misleading and incorrect in this context.