Some examples of Newton's Third Law are a person pushing against a wall, fish swimming in water, birds flying in the air and the automobile´s propulsion. Newton's Third Law explains the interaction between objects and states that for every action there will be an equal and opposite reaction. For example, a person pushing on a wall is exerting a forward force on it, but the wall is also exerting an equal an opposite force, or pushing back with the same force.
Similarly, a fish moving through water uses its fins to push back water. However, the water pushes the fish forward with a force that is equal to the backward force exerted by the fish's fins. These examples demonstrate that when two objects interact, a pair of forces develop that are opposite and equal.