The answer is D. Biogas.
Coal, petroleum, and natural gas are all fossil fuels. They are formed from the remains of ancient plants and animals that have been buried and subjected to heat and pressure over millions of years. Biogas, on the other hand, is a renewable energy source that is produced from the decomposition of organic matter, such as food waste, manure, and sewage.
Coal is a solid fossil fuel that is formed from the remains of ancient plants that have been buried and subjected to heat and pressure over millions of years. Coal is used to generate electricity, produce steel, and make chemicals.
Petroleum is a liquid fossil fuel that is formed from the remains of ancient marine organisms that have been buried and subjected to heat and pressure over millions of years. Petroleum is used to produce gasoline, diesel fuel, jet fuel, and other products.
Natural gas is a gaseous fossil fuel that is formed from the remains of ancient plants and animals that have been buried and subjected to heat and pressure over millions of years. Natural gas is used to generate electricity, heat homes and businesses, and produce chemicals.
Biogas is a renewable energy source that is produced from the decomposition of organic matter, such as food waste, manure, and sewage. Biogas can be used to generate electricity, heat homes and businesses, and produce transportation fuels.