Question

Fossil fuels are obtained from:
A.Remains of non-living materials
B.Dead remains of birds only
C.Dead remains of insects only
D.Dead remains of living organism

Answer 1

We can say fossil fuels are hydrocarbons, mainly coal, fuel oil or natural gas that formed from the remains of dead plants and animals. Fossil fuel also includes hydrocarbon-containing natural resources, which are not obtained from animal or plant sources.

Complete step by step answer:
We can define fossil fuel as a fuel obtained by natural processes, like anaerobic decomposition of buried dead organisms, consisting of organic molecules originating in ancient photosynthesis, which release energy in combustion.
Over millions of years, these decaying remains were enclosed by layers and layers of silt and buried deep underground. The pressure and heat at those depths converted them to the fossil fuels oil, natural gas and coal.
It contains a high percentage of carbon and includes coal, petroleum, and natural gas. Commonly used derivatives of fossil fuels are kerosene and propane. Fossil fuels range from volatile materials with low carbon-to-hydrogen ratios such as methane to liquids such as petroleum to nonvolatile materials consisting of almost pure carbon, like anthracite coal.
Fossil fuels could be solids, such as coal that is mainly obtained from land plants; liquids, like oil or tar sands; or gas, like methane. Oil and gas hydrocarbons are obtained mainly from the remains of marine plants.
Fossil fuel consists of hydrocarbon-containing natural resources, which are not obtained from animal or plant sources. We can call them mineral fuels.

So, the correct answer is Option D .

Note:
We also know that the burning of fossil fuels by humans is the largest source of releases of carbon dioxide that is one of the greenhouse gases that permits radiative forcing and contributes to global warming. A small part of hydrocarbon-based fuels are biofuels obtained from atmospheric carbon dioxide, and therefore do not raise the net amount of carbon dioxide in the atmosphere. Combustion of fossil fuels produces sulfuric and nitric acids that fall to Earth as acid rain, affecting both natural areas and the built environment.