Answer: Option A and D.
Explanation:
Biofuel is fuel that produced from either plants, algae or animals. There are four main types;
Ethanol that is made from corn.
Biodiesel made from animal fats and vegetable oil.
Green diesel made from algae and plant sources.
Biogas e.g methane made from animal manure and digested organic material.
Ethanol a type of biodiesel is made from fermentation of sugar components in starch crops.
Biodiesel is made from reaction between animals fats or vegetable oil with alcohol.