Correct option is D
The correct answer is (d) Fossil fuels.
· Fossil fuels are natural fuels formed deep under the Earth from the prehistoric remains of living organisms, such as plants and animals.
· Over millions of years, these remains were subjected to heat and pressure, resulting in the formation of fuels like coal, oil, and natural gas.
Information Booster:
· Liquid fuels, gaseous fuels, and solid fuels can include fossil fuels, but they are broader categories that also include fuels not derived from organic prehistoric remains.