What defines a hybrid vehicle?

A hybrid vehicle is specifically defined as one that incorporates both an internal combustion engine and an electric motor. This dual system enables a hybrid vehicle to utilize the strengths of both power sources, leading to improved fuel efficiency and reduced emissions compared to vehicles that rely solely on traditional internal combustion engines.

The combination allows for flexible operation, where the vehicle can switch between the electric motor and the gas engine or even use both simultaneously, optimizing performance and energy consumption. This technology supports environmental goals by decreasing the vehicle’s carbon footprint while providing the practicality and range that many consumers expect from their cars.

The other choices describe different vehicle classifications but do not accurately embody the hybrid vehicle's unique feature of using two distinct power sources. A vehicle that runs solely on electricity fits the definition of an electric vehicle, while choices that mention alternative fuels or traditional fuels pertain to various fuel types rather than the hybrid system itself.