Question

For every action there is an equal and opposite reaction, which law is that

Answer 1

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. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. So... Newton's third law would be the correct answer.