Select the word from the list that best fits the definition a response that occurs automatically to protect the body 1. reflex 2. peripheral nervous system 3. central nervous system 4. nervous system injuries

Option (1) is the correct answer.

Explanation:

The instantaneous movement or reaction of body in response to stimulus is known as reflex action.

For example, when we accidentally hit by a table and our knee gets hurt then in response we readily place our hands on our knee in order to slightly press it to relieve the pain.

Thus, we can conclude that a response that occurs automatically to help protect the body is called reflex.