Question

1. what is the nervous system?

spinal cord
network that carry messages to and from the brain and spinal cord t of the body
complex signals of the body that make you nervous

1. what are the 4 major parts of the brain?

Explanation:

Question 1

• "spinal cord" is just a part of the nervous system, not the system itself.
• "Complex signals of the body that make you nervous" misinterprets the nervous system's function (it's not about feeling "nervous" emotionally but about signal transmission).
• The correct option describes the nervous system as a network transmitting messages between the central nervous system (brain, spinal cord) and the rest of the body.

The four major parts of the brain (in common anatomical/physiological understanding) are the cerebrum, cerebellum, brainstem, and diencephalon (or cerebrum, cerebellum, brainstem, and hypothalamus/pituitary region, but more accurately cerebrum, cerebellum, brainstem, diencephalon). Alternatively, some sources categorize them as cerebrum, cerebellum, brainstem, and limbic system, but the most standard anatomical breakdown for major regions is cerebrum (largest part, with hemispheres), cerebellum (for coordination), brainstem (connects to spinal cord, controls vital functions), and diencephalon (includes thalamus, hypothalamus, etc.).

Answer:

The option: Network that carry messages to and from the brain and spinal cord to parts of the body (assuming the typo "t" at the end is a formatting error and should be "to parts").

Question 2