Which example illustrates a pull force?

A pull force is characterized by the action of drawing an object closer, typically through tension applied by a force. In the example of towing a car, the force exerted by the towing vehicle creates tension on the tow rope or chain, effectively pulling the car towards it. This is a clear demonstration of a pull force in action, as the towed vehicle moves along the direction of the applied force, moving closer to the source of the pull.

In contrast, pushing a cart forward involves a push force, where the cart is moved away from the person applying the force. Kicking a soccer ball or throwing a paper airplane also involve applying forces in a manner where the object is propelled away from the individual, which also does not qualify as a pull force. Thus, towing a car stands out as the clearest illustration of a pull force.