Question

multiple - choice question
what is a response?
we do not know what a response is
something you do not do
a reaction to the environment
saying \boo\
rewatch

Explanation:

A response is an action or behavior that is a reaction to a stimulus, which can be part of the environment. Saying "Boo" is just one - type of possible response, not a general definition. Not doing something is not a response, and we do know what a response is in general terms.

Answer:

C. A reaction to the environment