A throttle is a control mechanism used to regulate the flow of fuel or air into an engine, affecting its power output and speed. In vehicles, the throttle is typically operated by a pedal or lever, allowing the driver to increase or decrease engine performance as needed. In modern vehicles, electronic throttle control systems replace traditional mechanical linkages, using sensors and actuators to manage engine response more precisely. This technology enhances fuel efficiency and reduces emissions, contributing to better overall vehicle performance and environmental impact.