Which chemical process is described as enabling a fire to grow?

• A. Oxidation
• B. Reduction
• C. Condensation
• D. Evaporation

Answer: (A)

The process that allows a fire to grow is oxidation—the chemical reaction of fuel with oxygen that releases heat. Fire thrives when heat, fuel, and an oxidizer are present; oxidation provides the energy that keeps the temperature high enough to ignite more fuel and sustain the flame. The heat from oxidation warms adjacent fuel, driving more of it to reach ignition temperature and continue the burning process, so the fire can spread.

Reduction, in contrast, is a gain of electrons and does not drive burning. Condensation and evaporation are phase changes that affect how materials move between states, but they don’t power the chemical reaction that releases heat and fuels growth.