What are the two main branches of the nervous system?

The correct answer identifies the two main branches of the nervous system as the Central Nervous System (CNS) and the Peripheral Nervous System (PNS). The CNS consists of the brain and spinal cord and serves as the control center for the body, processing information and coordinating activity throughout the entire organism. The PNS includes all the nerves that lie outside the CNS and connects the CNS to the rest of the body, facilitating communication between the brain and spinal cord and the limbs and organs.

In contrast, options that refer to other systems, such as the Autonomic Nervous System or the various divisions of the nervous system like the Sympathetic and Parasympathetic Systems, are subsets of the broader categories represented by the CNS and PNS. The Autonomous Nervous System mentioned is indeed part of the PNS, focusing on involuntary body functions, while the Sympathetic and Parasympathetic divisions control specific involuntary functions related to stress responses and rest, respectively. However, they do not encompass the entire structure and function of the nervous system as clearly as the CNS and PNS do.