Consider the following statements Assertion A Storing the carbon contained in organic matter within ...........

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Consider the following statements.

Assertion (A): Storing the carbon contained in organic matter within the soil is seen as one way to mitigate climate change.

Reason (R): Soil Organic carbon (SOC) cannot be emitted back in gaseous form or lost into the atmosphere.

In the context of the above, which of these is correct?

A is correct, and R is an appropriate explanation of A.

A is correct, but R is not an appropriate explanation of A.

A is correct, but R is incorrect.

Both A and R are incorrect.

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Explanation:

Soil organic matter (SOM) is mainly composed of carbon, hydrogen and oxygen but also has small amounts of nutrients such as nitrogen, phosphorous, sulphur, potassium, calcium and magnesium contained within organic residues.
Organic matter contributes to nutrient turnover, soil structure, moisture retention and availability, degradation of pollutants, greenhouse gas emissions and soil buffering by reducing greenhouse gas emissions (in this case carbon dioxide) but to do this an increase in the more stable or resistant fractions of organic matter is required.
After carbon enters the soil in the form of organic material from soil fauna and flora, it can persist in the soil for decades, centuries or even millennia. Eventually, SOC can be lost as CO2 or CH4 emitted back into the atmosphere, eroded soil material, or dissolved organic carbon washed into rivers and oceans