The correct answer is C. Natural gas.
Fossil fuels are formed from the remains of ancient organisms that have been buried and subjected to intense heat and pressure over millions of years. They are non-renewable energy sources, meaning that they cannot be replaced once they are used up.
Wood is a renewable energy source, as it can be replanted and grown again. Coke is a solid fuel produced by heating coal in the absence of air. Producer gas is a fuel gas produced by the partial combustion of carbonaceous materials, such as coal, wood, or biomass.
Natural gas is a fossil fuel that is composed primarily of methane. It is a colorless, odorless gas that is lighter than air. Natural gas is found in underground reservoirs, often associated with oil deposits. It is extracted from the ground through wells and transported to processing plants, where it is separated into its component parts, including methane, ethane, propane, butane, and natural gasoline.
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.
In conclusion, the correct answer to the question “Which of the following is an example of fossil fuel?” is C. Natural gas.