Explain how knowledge of the conditions of combustion could help in fire fighting.

(i) The combustible substance like furniture, clothes and books, etc., are removed first when fire starts in a room, so that the fire may not spread due to the presence of a large number of combustible substance.
(ii) When the burning clothes of a person are covered with a blanket, the supply of air is cut off and burning stops.
(iii) A wet cloth does not burn because water present in it keeps the temperature of the cloth below its ignition temperature.