What is engine braking?

Answer: D — Downshifting through gears to slow the motorcycle

Engine braking is the process of using the engine's resistance to slow down the vehicle instead of solely relying on the brakes. When you downshift through gears on a motorcycle, the engine speed increases as the transmission is engaged to a lower gear, creating resistance from the engine which slows down the motorcycle. This technique can help control speed while descending hills or approaching a stop without overusing the brakes, allowing them to cool down and maintain their effectiveness.