The earth's differentiation and size were significant factors for life on earth because earth's composition and gravitational attraction keep the moon and sun in orbit keep people grounded to create and retain earth's atmosphere create and retain internal heat

Option (2), (3) and (4)

Explanation: Our earth plays a dynamic role. The size of the earth is huge and comprised of a huge mass. Both the composition as well the gravitational force is equally important in understanding the complex mechanisms or processes that undergoes outside and within it.

           It is due to the the gravitational pull that helps the moon to maintain its orbital path around the earth and so are people grounded to the top of the crust. Earth's atmosphere is comprised of various gases and are found to exist today from the time of its formation.

                      The internal heat of the earth is also equally important that maintains the total heat budget of the earth along with the heat generated from the incoming solar radiations. This is a continuous process that changes over a certain time period

a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]