Which set of elements makes up the fire triangle?

• A. Fuel, Oxygen, Water
• B. Heat, Fuel, Oxygen
• C. Heat, Oxygen, Fuel
• D. Heat, Fuel, Steam

Answer: (B)

The fire triangle is built on three elements that must be present for combustion to occur: heat, fuel, and oxygen. Heat raises the fuel to its ignition temperature, fuel provides the substance to burn, and oxygen sustains the chemical reaction. The correct set includes all three of these elements, which is why Heat, Fuel, Oxygen is the right answer. If any one of them is removed, the fire goes out: cooling lowers heat below ignition, removing the fuel cuts off the energy source, and reducing oxygen starves the flame. Water or steam aren’t part of the triangle itself; they’re tools used to remove heat or modify the fire environment, not fundamental elements of the trio.