Which term is defined as a chemical other than a blasting agent or explosive that initiates or promotes combustion in other materials, causing fire either by itself or through the release of oxygen or other gases?

• A. A chemical other than a blasting agent or explosive that initiates or promotes combustion in other materials, causing fire either by itself or through the release of oxygen or other gases.
• B. A substance that prevents combustion by absorbing heat.
• C. A substance that stores fuel for later use.
• D. A material that always explodes on contact with heat.

Answer: (A)

An oxidizer is a chemical that initiates or promotes combustion in other materials by releasing oxygen or other gases that support the flame. It can cause fires to start or burn more vigorously, even if the oxidizer itself isn’t flammable. This is why it’s the correct concept: it directly describes a substance that enables or enhances burning by supplying oxygen. A fire suppressing substance would prevent combustion by absorbing heat, a fuel stores fuel for later use, and an explosive material would detonate or explode on heating—none of these describe the role of promoting combustion through oxygen release.