According to Newton's Third Law, what occurs for every action force?

Newton's Third Law states that for every action force, there is an equal and opposite reaction force. This principle means that whenever one object exerts a force on another object, the second object exerts a force of equal magnitude and in the opposite direction back on the first object. This fundamental concept underlines the interactions between objects and helps us understand motion and forces in a variety of contexts, such as walking (where your foot pushes down on the ground and the ground pushes you back up), or how rockets function (where gas is expelled downwards, propelling the rocket upwards).

The specific equality and opposition of these forces are crucial, as it emphasizes that forces only exist in pairs—neither force can exist without the other. This helps to maintain the conservation of momentum in isolated systems.

In the context of the other choices, the notion that there is no corresponding reaction force contradicts the very essence of Newton's Third Law. Similarly, claiming the reaction force is stronger misses the critical point of equality in forces. Lastly, the idea that the reaction force only occurs if both objects are at rest is incorrect, as the law applies universally regardless of the state of motion of the objects involved. Forces act according to Newton's Third Law in all scenarios,