Fossil fuel:
Fossil fuel is a natural fuel made composed of the remains of living organisms that have been buried beneath the earth’s surface for millions of years, such as coal or petroleum.
Coal and petroleum formation:
Coal and petroleum are formed from the remains of dead plants and animals that have been subjected to a range of biological and geological processes over a lengthy period of time.
Petroleum comes from the bones of perished creatures that lived millions of years ago, whereas coal comes from the remains of trees and other plants that lived millions of years ago.
Final answer:
Hence, fossil fuels are the natural fuels made up of the remains of living organisms that have been buried beneath the earth’s surface for millions of years.
Coal and petroleum were formed from the remains of deceased plants and animals that have been exposed to a variety of biological and geological processes over a long period of time.