The correct answer is: a) Natural gas
Natural gas is a fossil fuel formed when ancient plants and animals decomposed under intense heat and pressure over millions of years. It is found in underground reservoirs or trapped in coal beds. Natural gas is a clean-burning fuel that produces fewer emissions than other fossil fuels, such as coal and oil. It is also a versatile fuel that can be used to generate electricity, heat homes and businesses, and power vehicles.
Petroleum is a fossil fuel formed from the remains of ancient marine organisms. It is found in underground reservoirs or trapped in sedimentary rocks. Petroleum is a liquid that is made up of a mixture of hydrocarbons. It is a valuable resource that is used to produce gasoline, diesel fuel, jet fuel, and other products.
Lignite is a type of coal that is formed from plant material that has been buried and subjected to heat and pressure over millions of years. It is a soft, brown coal that has a low energy content. Lignite is used to generate electricity and to produce coke, which is used in the steelmaking industry.
Uranium is a radioactive metal that is found in nature. It is used to produce nuclear energy. Uranium is a finite resource and its supply is dwindling.