Which combination lists the three elements of fire?

• A. Heat, Fuel and Oxygen
• B. Water, Fuel and Oxygen
• C. Heat, Water and Oxygen
• D. Heat, Fuel and Nitrogen

Answer: (A)

Fire consists of three elements: heat, fuel, and oxygen. This is the Fire Triangle. Heat provides energy to keep combustion going, fuel is the combustible material, and oxygen supports the chemical reaction. If you remove any one of these, the fire cannot continue. In practice, you extinguish a fire by cooling it to below ignition temperature, removing or isolating the fuel source, or reducing the available oxygen (for example, by sealing the space or using an inert gas). The other options mix in water or nitrogen, which are not elements of the triangle themselves but are used in suppression strategies. Therefore, the three fundamental elements are heat, fuel, and oxygen.