Which of the three laws deals with interactions

Newton's three laws of motions are good foundation for classical mechanics.in newton's three laws he describe about the relationship between a body and force acting upon it and also motion with respect to the forces. Newton’s first law of motion:an object at rest and an object in motion stays in motion with the same speed and in same direction unless an external force acting on object.sometimes it also refers to law of inertia. Example:if you are in a car,movi