Answer: C. biodiesel
Step-by-step explanation:
Biodiesel is the fuel which is produced from the vegetable oil and animal fat. It consists of esters of long chain alkyl molecules. The fuel is produced by the transesterification reaction in which fats and oils are converted into biodiesel. It is a kind of biomass energy which when burn produce huge amount of heat energy like other conventional fuels. It is a renewable source of energy and does not produce much pollution in the atmosphere.