What are the four elements of the fire tetrahedron?

The correct answer identifies the four essential elements of the fire tetrahedron as heat, fuel, oxygen, and chemical reaction. This tetrahedron illustrates the fundamental requirements for fire to ignite and sustain combustion.

Heat is necessary to raise the temperature of the fuel to its ignition point, enabling combustion to occur. Fuel serves as the combustible material that burns when sufficient heat is applied. Oxygen is a key component that supports the chemical reactions associated with combustion; for most fires, oxygen is found in the air. The chemical reaction element represents the process that occurs during combustion, where heat, fuel, and oxygen interact to produce flames and heat.

Recognizing these elements is critical for firefighting and prevention strategies, as removing any one of these components can effectively extinguish a fire. Understanding this tetrahedron helps fire officers and firefighters develop tactics that address each element to control and mitigate fires effectively.