What is true about a motor vehicle that operates on electric power from overhead trolley wires?

A motor vehicle that operates on electric power from overhead trolley wires is classified as a motor vehicle because it meets the general definition of a vehicle designed for transportation on public roadways. The classification of a motor vehicle encompasses various types of vehicles, including those powered by electricity, as long as they are used for the movement of people or goods.

In this context, such vehicles can include trams or trolleys, which are common in urban transportation systems. They are designed to carry passengers along set routes and are recognized under transportation regulations as part of the larger category of motor vehicles. Their operation is subject to similar traffic rules as other vehicles, affirming their classification even when they may not rely on traditional internal combustion engines.

Considering the other options, they fail to align with the proper classification of vehicles running on electric power via trolley wires. Thus, recognizing this particular vehicle's classification as a motor vehicle emphasizes the diverse types of power sources and operational designs within the motor vehicle category.