Which of the following is classified as a motor vehicle?

A snowmobile is classified as a motor vehicle because it is a self-propelled vehicle designed for travel on snow and ice, equipped with a motor. This fits the legal definition of a motor vehicle, which typically encompasses any vehicle that is powered by an engine and used for transportation. In contrast, bicycles are generally excluded from this classification since they are not motorized and rely on human power for propulsion. Similarly, railroads are not classified as motor vehicles as they operate on fixed tracks and do not pertain to the general category of vehicles driven on roads or highways. Thus, the reasoning supports that a snowmobile is a motor vehicle due to its engine-powered mobility on specific terrains.