Which of Newton's laws of motion is the "action-reaction" law? A. first B. second C. third pls help i really need help asap

Newton's 3rd law of motion is the " action - reaction " law .

This 3rd law states that ;

If a body A applies a force on body B then body B also applies force on body A which is equal in magnitude and opposite in direction .

In simple terms it is stated as ;

For every action there is an equivalent opposite reaction .

This is represented as ;

Example :-

When a birds flys in the air it pushes the air with it's wings downwards ( action ) . Similarly, the air pushes the bird upwards ( reaction ) .