1) The ability to do work a) sources b) energy c) fuel d) food 2) Plant or animal materials which can be used as a fuel are known as  a) fossil fuel b) firewood c) coal d) biomass 3) The fuels which are made from the buried plants and animals. a) energy b) tidal waves c) Fossil fuel d) biomass 4) A kind of alcohol which is produced as a bio_product in sugar cane industry a) Petrol b) Ethanol c) diesel d) coal 5) Main natural source on the earth is a) Wind b) water c) Biomass d) Sun

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