What term refers to all combustible materials that sustain a fire?

The term that refers to all combustible materials that sustain a fire is "fuel." In the context of fire, fuel is any substance that can be burned to produce energy. This includes solid materials like wood and paper, liquids like gasoline, and gases like propane. For a fire to occur, fuel must be present, along with an ignition source and an oxidizer, typically oxygen in the air.

Understanding this concept is crucial for fire inspectors and safety professionals because it helps them evaluate fire hazards and implement fire prevention measures. By identifying and managing fuel sources, they can reduce the risk of fire incidents and enhance safety protocols.