Which help us to get energy for working anything

A fuel is a combustible material like LPG, petrol, etc. that undergoes combustion i.e. burns in the presence of air (oxygen) and generates a large amount of heat (energy). A fuel may\xa0be solid, liquid or gas. A fuel cannot burn as long as its temperature is lower than its ignition temperature. E.g.\xa0Fuels like coal and charcoal are used in industry. Fuels like petrol, diesel and CNG are used for running automobiles. Food is a fuel for our body.