Which of the following best describes a flammable liquid?

A flammable liquid is specifically defined by its ability to produce enough vapor to ignite at relatively low temperatures. The correct answer highlights that a flammable liquid is one that burns when its flashpoint is under 100 degrees Fahrenheit. The significance of this temperature lies in the fact that it represents a threshold for safe handling and storage. Liquids with a flashpoint below this temperature can form flammable vapor-air mixtures readily, making them especially hazardous in various environments, particularly if there are sources of ignition present.

Understanding flashpoints is crucial in fire investigation and safety management as it helps in assessing the fire risks associated with different liquids. This detailed grasp of the behavior of flammable liquids plays a vital role in fire prevention, control, and the investigation of fire-related incidents.