What function does the Spark Plug serve in a vehicle?

The spark plug is a critical component of a vehicle's ignition system, specifically responsible for delivering an electrical charge to the combustion chamber of the engine. This charge creates a spark that ignites the air-fuel mixture, enabling the engine to produce power. The correct answer highlights this essential function of the spark plug, as it directly relates to the engine's operation.

In contrast, the other options incorrectly associate the spark plug's function with unrelated vehicle systems, such as the suspension and power steering, where no electrical ignition charge is required or relevant. Therefore, the correct answer accurately captures the role of the spark plug within the engine's ignition process, distinguishing it from the functions of other vehicle components.