The correct explanation of how bumper cars at an amusement park demonstrate Newton’s third law is:
If two bumper cars collide with a certain force, then they will move away from each other in opposite directions with the same force.
This is because Newton's third law states that for every action, there is an equal and opposite reaction. When one bumper car exerts a force on another during a collision, the second car exerts an equal and opposite force back on the first car. This causes both cars to move away from the point of collision in opposite directions.