An accelerant is best defined as what?

An accelerant is defined as a material that is used to intensify the burning of a fire. This includes substances that can promote combustion and help the fire grow more rapidly. Common examples of accelerants include gasoline, lighter fluid, and alcohol. These materials provide additional fuel, making it easier and faster for a fire to spread.

In the context of fire investigation, recognizing accelerants is critical for determining the cause of a fire, especially in cases where arson is suspected. Investigators may collect samples from the scene to test for accelerants, which can lead to understanding how the fire was started and its progression.

Other options describe materials that either help control or extinguish a fire, which is contrary to the role of an accelerant. Thus, the correct definition emphasizes the function of accelerants in promoting and intensifying fire activity.