The voltage for the engine's power stroke is delivered from which component to the cylinder?

The correct answer identifies that the spark plugs are responsible for delivering the voltage necessary for the engine's power stroke to the cylinder. In an internal combustion engine, the spark plugs create a spark when voltage is applied, igniting the air-fuel mixture within the cylinder. This ignition is critical because it initiates the combustion process, resulting in power generation for the engine.

The ignition coil serves to amplify the battery voltage to a level high enough to create a spark across the spark plugs. While essential in the overall process, the ignition coil does not directly send voltage to the cylinder; rather, it delivers it to the spark plugs, which then perform the actual ignition.

The fuel pump is involved in delivering fuel to the engine but does not contribute to the electrical system that ignites the fuel. Similarly, the throttle body is part of the air intake system that controls the amount of air entering the engine but is not involved in the ignition process that occurs inside the cylinder.