What is a trailer designed to do?

A trailer is specifically designed to transport persons or property without placing the weight directly on a motor vehicle. This characteristic allows trailers to be towed behind vehicles, utilizing the strength and capability of the towing vehicle for movement while carrying cargo or passengers. The design of a trailer typically includes a hitch system that attaches to the towing vehicle, enabling the efficient transfer of weight and load without directly impacting the motor vehicle's structure or balance.

The other choices may incorporate aspects of trailers, such as providing mobile housing or serving as standalone transportation vehicles in certain contexts, but they do not accurately capture the primary purpose of a trailer. Additionally, while trailers can be drawn by various types of vehicles, the essential function remains centered on the concept of transporting items or individuals while relying on the towing vehicle, differentiating it from being a self-sufficient transport option.