Which of the following descriptions of hybrid cars is correct? Hybrid cars do not use gasoline engines. Hybrid cars are energy-efficient. Hybrid cars have not been made yet. Hybrid cars rely on biomass fuel.

Hybrid cars are energy-efficient.<br /><br />Hybrid cars combine a gasoline engine with an electric motor to improve fuel efficiency and reduce emissions. They do not rely solely on gasoline engines, and they have been produced and are available on the market.