Final answer:
Newton's third law indicates that for every action force, there is an equal and opposite reaction force, with this pair of forces acting on two different bodies.
Step-by-step explanation:
Newton's third law states that for every action force, there is a reaction force that is equal in size and acts in the opposite direction. When applying this law to various situations, it's important to recognize that these forces are part of what we call action-reaction pairs. Despite being equal in magnitude, the action and reaction do not cancel each other out because they act on different objects. For instance, if you were to push against a wall, the wall pushes back with equal force, but in the opposite direction. This concept is a fundamental symmetry in nature, illustrating the mutual interactions between two bodies or systems.