What is the main advantage of using heated de-icing fluids?

Heated de-icing fluids are specifically designed to be more effective at melting ice that has already formed on the aircraft's surfaces. The primary advantage of using these heated fluids lies in their ability to raise the temperature of the surface, allowing the ice to melt more efficiently and preventing further accumulation of ice. This is crucial for maintaining safe flight operations, as ice can disrupt the airflow over wings and control surfaces, impairing the aircraft's performance and safety during takeoff and flight.

The other options do not accurately represent the main advantage of heated de-icing fluids. For instance, cooling the aircraft faster, reducing weight, or enhancing de-icing boots' performance are secondary effects or characteristics that do not relate directly to the primary function of heated de-icing fluids, which is to effectively manage and remove ice.