The correct explanation of how a car’s radiator prevents the engine from overheating is as follows:
The radiator pumps coolant in a continuous flow through the car’s engine. Heat from the engine is drawn into the coolant and pulled away from the engine block and back to the radiator. The radiator’s contact with the car’s cool hood allows it to use conduction to transfer heat from the coolant to the air outside.
This description accurately captures the process of cooling in a car radiator, which involves the flow of coolant, heat absorption, and heat transfer through conduction to the surrounding air.