What equipment is responsible for loading unused food and drinks onto the aircraft?

The catering truck is specifically designed to load food and beverages onto an aircraft. It is equipped with features that allow it to transport food trolleys and supplies efficiently and safely, ensuring that all items are properly secured and ready for service during flights. This specialized vehicle plays a crucial role in catering operations by adhering to the specific requirements of the airline and the regulations set forth by aviation authorities.

The refueler is primarily used for filling the aircraft's fuel tanks, making it unsuitable for handling food items. The lavatory truck is responsible for servicing the aircraft’s sanitation facilities and is not equipped to transport food. The baggage cart tractor is designed for transporting luggage and cargo to and from the aircraft, which does not involve any catering functions. Thus, the catering truck is the only equipment among the choices that meets the specific need for loading food and drinks onto the aircraft.