Which vehicle type is specifically designed to be drawn by a farm implement?

The correct choice highlights the farm tractor as a vehicle specifically designed to be drawn by a farm implement. Farm tractors are engineered primarily for agricultural purposes, and one of their main functions is to tow various farming equipment and machinery. Such implements may include plows, harrows, seeders, and other tools that assist in the cultivation and maintenance of farmland.

In the context of farming operations, the ability of a tractor to connect to different implements allows for efficiency and versatility in agricultural tasks. This is a fundamental aspect of their design, distinguishing them from other vehicle types.

While light trucks, house trailers, and motorcycles serve valuable purposes, they do not have the primary function or design intention of being drawn by farm implements. Light trucks are typically used for transportation and hauling but are not built specifically for agricultural tasks. House trailers are designed for habitation rather than agriculture, and motorcycles are not equipped to tow any machinery at all. Thus, the unique capability of farm tractors to facilitate agricultural work makes them the correct answer.