What delivers voltage for the engine's power stroke from the distributor to the cylinder?

The spark plugs play a crucial role in delivering voltage for the engine's power stroke. When the ignition system is activated, the ignition coil produces a high-voltage pulse that is sent to the spark plugs. The spark plugs then create an electrical arc that ignites the air-fuel mixture within the engine's cylinders, resulting in the combustion process that powers the engine. This process is vital for the engine to function efficiently, as it directly influences the initiation of the power stroke.

In the context of the other choices, the ignition coil generates the high voltage needed for the spark plugs but is not responsible for delivering it to the cylinder. Fuel injectors are responsible for delivering fuel into the combustion chamber but do not engage in the ignition process. The timing belt plays a significant role in synchronizing the engine's components but does not directly contribute to the voltage delivery related to combustion. Therefore, the spark plugs are indeed the components that ultimately facilitate the ignition, making them essential in the engine power stroke process.