Question

It is a non-renewable resource.
(a) Water
(b) Solar energy
(c) Coal
(d) Soil

Answer 1

Non-Renewable source is those which cannot be generated fast once it gets replenished. It takes a long time for its regeneration, maybe millions of years take place for regeneration. The most common non-renewable source is fossil fuels.

Complete answer:
The use of fossil use is high as compared to its formation and the most commonly used fossil fuel for home purpose and machine or engine work is coal. Coal generally forms in two ways one by the burning of wood and the second by the destruction or breaking of stone which becomes combustible black and brownish-black sedimentary rock. Coal formation started from the carboniferous period nearly about 300 million years ago.
In the case of the forest, coal formation takes place by giant high plants, once the plant falls down it is destroyed with the help of microorganisms and buried inside the soil. Formation of coal takes place in four stages- peat, lignite, bituminous, and anthracite. With the heat and pressure, the plant remains to start converting into black hard rock type structure coal. The heat generation takes place with the help of lava and pressure takes place by soil formation the upper layer generates pressure to the lower layer.
So, the correct answer is ‘Coal’.

Additional information: Water, solar energy, and soil is a renewable source.
Water needs the water cycle for regeneration, maybe water is depleting due to human unnecessary acts but it gets fulfilled by rain in the rainy season and one of the main reasons for water spoilage is garbage or industrial waste so it only needs proper storage and treatment to make it useful.
Solar energy is the sun’s energy and it’s not possible that solar energy will get depleted because it’s natural.
Soil formation takes place by the destruction of rock and the formation of humus. Soil can easily be replaceable and the depletion process is slow.
That's Why renewable sources replace or regenerate fast as compared to nonrenewable sources.

Note: The demand for coal is high as compared to its formation that is why it is the most important non-renewable. From time to time in houses people switched from fossil fuel to LPG for making food but still demand is high due to many of its uses in heat generation. The formation of coal also becomes very slow with the depletion of forests. Nowadays wood coal is replaced by stone coal but their burning efficiency is different.