Final answer:
Material arranged to start a fire can be candles, matches, or chemicals, and this is called an Ignition Device. It is essential in the process of combustion, reacting with oxygen and releasing heat to initiate a fire.
Step-by-step explanation:
The definition of material arranged to start and feed the initial fire, which can include candles, matches, electrical, mechanical, and chemicals, is known as an Ignition Device. This differs from accelerants, which are substances used to amplify an existing fire. Materials such as coal, wood, diesel, and certain chemicals can undergo combustion when exposed to an ignition source. The process of combustion involves the reaction of the material with oxygen, releasing heat and initiating a fire. Fireworks, as an example, embody this concept, where heat from a lit fuse ignites the reactant chemicals to create a vibrant display in the sky.