Which of the following describes how a spark ignitor functions?

A spark ignitor functions by producing a spark to ignite the gas in heating systems. This is a critical role in the ignition process, as it ensures that combustible gas is lit safely and effectively, allowing the heating system to operate as intended. By generating a high-voltage spark, the ignitor creates a sufficient temperature to ignite the gas mixture, leading to combustion and subsequent heat generation.

The focus on producing a spark distinguishes this mechanism from others that might generate heat directly or involve variations in pressure. While operating on low voltage is a characteristic of some components in heating systems, it is not the primary function of the spark ignitor itself. The spark ignitor is essential for initiating the combustion process safely and efficiently, making it a vital component in gas-fired heating systems.