Question

explain how every action have an equal and opposite reaction.

Answer 1

In fact of making the net balance force equal every action have an equal and opposite direction.....example if we are pushing a body of mass m with force f then the equal Nd opposite force is applying on it...if it is not moving...

Answer 2

for example if you hit a ball on the ground with a force it will rebounds again with the same force therefore verifies the law of Newton