The correct option is
C Natural gas
The correct option is C.
Explanation of correct option:
- Decomposing plants and animals are the sources of fossil fuels, and are non-renewable fuels.
- These oils can be burned to produce oil because they contain carbon and hydrogen at the Earth's surface.
- Petroleum, coal, natural gas, and emulsion are the four different kinds of fossil fuels.
- Natural Gas is mainly extracted from the petroleum deposits deep beneath the earth.
- In fact, it occurs just above the layer of crude oil, as gases are lighter than oil.
Final answer: Fossil fuels include natural gas.