Final answer:
An igniter is typically made of ceramic material because of its ability to withstand high temperatures and provide electrical insulation. Other options like thermocouple, copper wiring, and spark plug are components related to the ignition process but are not materials igniters are made of.
Step-by-step explanation:
An igniter is a device used to initiate combustion in a gas appliance, engine, or rocket. There are various types of igniters, but most commonly, they can be made of ceramic materials, which are resistant to high heat and provide electrical insulation.
The options presented in the question seem to describe different components involved in the process of ignition. A thermocouple is a sensor used to measure temperature; copper wiring is used to conduct electricity, and a spark plug is a component in gasoline engines that ignites the fuel-air mixture. Therefore, while a spark plug may contain ceramic material as part of its construction, in the context of the question, the igniter itself is most likely made of A. Ceramic material as it is a common material used to withstand high temperatures without conducting electricity, which is critical for the ignition process.