Which part of the cooling system assists in increasing airflow through the radiator?

The fan blades are designed to create airflow through the radiator, enhancing the cooling process of the engine. When the engine operates, it produces heat, which is absorbed by the coolant flowing through the radiator. The fan blades help to draw air through the radiator's core, which allows for better heat dissipation. This increased airflow helps maintain optimal engine temperatures, especially during idling or low-speed driving when natural airflow might be insufficient.

While the other components mentioned play crucial roles in the cooling system, they do not directly increase airflow through the radiator. The fins are instrumental in improving heat transfer but do not create airflow themselves. The thermostat regulates the flow of coolant based on temperature but does not influence airflow. The water pump circulates the coolant through the engine and radiator, but again, it does not contribute to air movement. This distinction is key in understanding the specific function of fan blades within the cooling system.