For every action, there is an equal and opposite reaction.

Here's a breakdown:

* Action Force: The original force that is applied.

* Reaction Force: The equal and opposite force that is produced in response to the action force.

Example:

Imagine you push on a wall. You are applying an action force to the wall. The wall, in turn, pushes back on you with an equal and opposite reaction force. This is why you feel the wall pushing back on your hand.

Important Note: Newton's Third Law applies to *all* interactions between objects, not just in cases of pushing or pulling.