Which term describes a substance that can support the combustion of fuel?

The term that describes a substance capable of supporting the combustion of fuel is an oxidizing agent. An oxidizing agent facilitates a chemical reaction by promoting the process of oxidation, which is integral to combustion. In the context of fire and flames, the oxidizing agent is typically oxygen, as it reacts with the fuel to produce heat and light, essential components of combustion.

In contrast, a reducer reduces the oxidation state of other substances in chemical reactions and does not support combustion. Combustible materials are substances that can easily ignite and burn but do not actively support the combustion process like an oxidizing agent does. An inhibitor is a substance that slows down or prevents a chemical reaction, including combustion. Thus, the role of the oxidizing agent is crucial in the combustion process, as it enables the reaction to occur.