What is the function of the nervous system? What is the
basic unit of the nervous system?

(Read the explanation)

Explanation:

Sample response: The nervous system helps the body to respond to internal and external stimuli. Sometimes the stimuli can be dangerous so the nervous system also protects the body. The basic unit of the nervous system is the neuron.  

How to re-word it: What the nervous system does is it helps your body to react to external stimuli, and internal. But the stimuli can be dangerous sometimes, so the nerve system has to protect the body. The basic unit of your nervous system is called the neuron.

I'm so sorry if this was wrong but I tried my best to re-word it... (edg) hope this helped tho.

correct answer is a. and d.