Correct option is A
In a governor, the centrifugal force acting on the rotating flyweights is the key factor that controls fuel consumption and maintains a consistent engine speed. As the engine speed increases, the flyweights spin faster, and the centrifugal force causes them to move outward, which in turn adjusts the throttle or fuel supply to reduce fuel flow. Conversely, if the engine slows down, the flyweights move inward due to decreased centrifugal force, increasing fuel supply. This mechanism allows the governor to automatically maintain a nearly constant engine speed.
