Answer:
coal is the correct answer.
Step-by-step explanation:
Fossil fuels are formed by a natural process, decayed animals and plants are converted into fossil fuels by the exposure heat and pressure within the earth's crust.
Types of fossil : coal, natural gas, and petroleum.
Coal is the nonrenewable resource since its formation occurs in millions of years
coal is fossil fuel because it is formed from the fossilized decay of plants and animals, contain carbon as main and also hydrogen, oxygen, nitrogen, and sulfur.