What four elements are included in the Fire Tetrahedron?

The Fire Tetrahedron comprises four essential elements necessary for fire to occur: Fuel, Oxygen, Heat, and a Chemical chain reaction. Each of these elements plays a crucial role in the fire process.

• Fuel represents any combustible material, whether solid, liquid, or gas, that can ignite and sustain a fire.

• Oxygen is the element that supports combustion, which is typically provided by the surrounding air. Most fires need a minimum concentration of oxygen to maintain the combustion process.

• Heat is required to elevate the fuel to its ignition temperature, and it often comes from a heat source such as a spark, flame, or another fire.

• The Chemical chain reaction refers to the series of exothermic reactions that occur once the fire has started, enabling it to continue burning as long as the other three elements are present.

Understanding these elements helps in fire prevention and control measures, as removing any one of these components will extinguish the fire. The other options do not encompass the correct elements of the Fire Tetrahedron, focusing instead on different aspects of combustion but not defining the fundamental requirements for fire.