Three ways your body reacts to something in the environment without any thought or conscious decision?

When we touch something that is hot our body's natural reaction is to pull away from whatever is causing the discomfort. We also tend to flinch without any thought when something is thrown at us, the same goes for when we are frightened, we jump or flinch.

Explanation:

i think it is true in my reasonment ..

substitution is the answer in this case