The correct answer is Wind.Energy is one of the major parts of the economic infrastructure, being the basic input needed to sustain economic growth.There exists a strong relationship between economic development and energy consumption.The more developed a country is, the higher the per capita of energy consumption and vice-versa.Human civilization relies on different sources of energy.Source of Non - conventional energyAdditional InformationWood:Wood forms the source of energy for a lot of people still living in rural areas.It has a low calorific value and cannot be used for industrial processes.Crop Residue:Crop residue is used as an energy source on farms.They have the least calorific value and are not found in abundant quantities.?Petrol:Petrol is obtained from petroleum.products of petroleum are known as black gold.The caloric value of petrol is 45000 KJ/kg Where K = Kelvin.Coal:Coal is a sedimentary black or dark brown rock that varies in composition.Some types of coal burn hotter and cleaner, while others contain high moisture content.It contains compounds that contribute to acid rain and other pollution when burned.Used in industrial processes.