What is the term for a load carrying part attached to a vehicle and separated from the passenger compartment?

The term for a load carrying part attached to a vehicle and separated from the passenger compartment is "bed." This is particularly applicable to vehicles such as pickup trucks, where the bed is the open area at the rear designed for carrying cargo. It’s distinct from other vehicle components because it serves a specific purpose related to hauling and transporting goods, while being physically separated from the area where passengers sit.

The other options refer to different components of a vehicle: a chassis is the base frame of the vehicle that supports the body and components; a hitch is an attachment point for towing, typically added to the vehicle but not a part of the structure designed specifically for carrying loads; and a frame refers to the underlying structure of the vehicle that supports various components. Each of these has its own function within the vehicle but does not describe a dedicated cargo space like the bed does.