for every action, there is an equal and opposite reaction

This statement is known as Newton's Third Law of Motion. It means that any force exerted onto a body will create a force of equal magnitude but in the opposite direction on the object that exerted the first force. Here's a step-by-step explanation:

1. Identify the action: The action can be any kind of force, like pushing a wall or pulling a cart.

2. Identify the reaction: The reaction is the response to the action. If you push a wall, the wall pushes back with an equal amount of force. If you pull a cart, the cart pulls back.

3. The forces are equal: The amount of force in the action and reaction are the same. This means if you push a wall with 10 Newtons of force, the wall pushes back with 10 Newtons of force.

4. The forces are opposite: The direction of the action and reaction are opposite to each other. If you push a wall to the right, the wall pushes back to the left. If you pull a cart towards you, the cart pulls away from you.

5. This law applies to all interactions: Newton's Third Law applies to all forces and interactions, not just the ones we can see and feel. It applies to gravity, magnetism, and all other forces.

So, in summary, for every action, there is an equal and opposite reaction. This is a fundamental principle of physics that helps us understand how objects interact with each other.