When a ball drops onto the floor it bounces. Why does it bounce ?

When a ball is dropped, it undergoes a collision with the floor. According to Newton's third law of motion, for every action, there is an equal and opposite reaction [t1][t4]. As the ball strikes the floor, it exerts a downward force on the ground, which causes the ball to compress and store elastic potential energy [t1][t2]. Simultaneously, the floor exerts an equal and opposite upward force on the ball [t1][t9]. This upward force exerted by the floor is the direct cause of the ball's rebound or bounce [t5]. While the ball's elasticity allows it to store and return energy, the physical mechanism of the bounce is the reaction force from the floor [t3]. Option 1 is technically a law describing the interaction, but option 2 identifies the specific physical cause (the force) that changes the ball's momentum upward.