Question

The major reservoir of carbon on earth is
A. Producers
B. Spindle
C. Light
D. Earthworms, mites
E. Ocean

Answer 1

Hint: Oceans are called as the carbon sink as it absorbs more carbon than it emits.

Complete answer: In the atmosphere, the amount of carbon is quite small, the ocean is known as the major reservoir of carbon on earth as it is the largest reservoir with forty thousand Gtc and the biosphere is nearly six hundred and ten Gtc as sizes of reservoirs are given in mass units.
The ocean is in direct contact with air which makes it more prone to absorb carbon.
The deep trenches in the ocean and the water in the ocean have rich dissolved carbon, the organic matters also serve as a source of carbon, the nutrient leaching and precipitation which occurs in the ocean plays a major role in making the ocean the large reservoir of carbon.
Around thirty-seven thousand billion tons of carbon are stored in the ocean.

Additional information: Carbon in the Earth's atmosphere exists in two major forms: carbon dioxide and methane.
Both of these gases absorb and retain heat in the atmosphere and are somewhat responsible for the greenhouse effect.
Methane produces a major greenhouse effect per volume as compared to carbon dioxide, but it exists in much lower concentrations and is short-lived than carbon dioxide, making carbon dioxide the more necessary greenhouse gas of the two.

Hence, the correct option is ‘E’

Note: The major reservoir ocean reacts to climate change by giving some amount of carbon dioxide to the atmosphere will greatly affect the atmosphere. The atmosphere is greatly dependent on the ocean reservoir.