A force is a push or a pull that acts upon an object as a results of its interaction with another object. ... These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction....

According to Newton's third law of motion as follows:

to every action there is an equal and opposite reaction I.e action equal to reaction
this was proposed by Isaac Newton who has studied the motion of various objects the and had given this law it has a relationship with our life as many applications and some of them are:
1. when we swim in a swimming pool we exert force on the water And the water exert a force which is equal to the force which we apply which enables us to move forward a the force of our body is action and the force exerted by the water on our body is reaction
2. when we move on the ground the ground exerts a force on our body and we exert equal force to it here the force of the ground is the reaction and the force of our leg is the action