Newton's Third Law of Motion, also known as the Law of Reaction, states that for every action, there is an equal and opposite reaction. This means that if one object exerts a force on a second object, the second object will exert a force of equal magnitude but in the opposite direction on the first object.
This law is fundamental in understanding how forces work in pairs. For example, when you push against a wall, the wall pushes back with an equal force in the opposite direction. Similarly, when a rocket expels gas out of its engines, the action of the gas being pushed downwards results in an equal and opposite reaction that propels the rocket upwards.
In conclusion, Newton's Third Law emphasizes the interaction between forces, demonstrating that forces always come in pairs, with every action generating an equal and opposite reaction.