Combustion is a chemical process in which a substance reacts rapidly with oxygen giving off heat as a result
The original substance is called fuel
Elements required for fire
Fuel
Heat
Oxygen
Fuel - For a fire to start, there should be a material to burn at the first place
Flammable materials give off flammable vapors which, when heated, burst into flames
Oxygen - Air around us is approximately 21% oxygen and, since most fires only need at least 16% oxygen to burn, oxygen in our environment becomes oxidizing agent in this chemical reaction