In case of which one of the following biogeochemical cycles, the weathering of rocks is the main source of release of nutrient to enter

Explanation

In nature, phosphorus is found mostly in the form of phosphate ions. Phosphate compounds are found in sedimentary rocks, and as the rocks weather down over long time periods, the phosphorus they contain slowly leaches into surface water and soils. Volcanic ash, aerosols and mineral dust can also be significant phosphate sources. Phosphorus has no real gas phase, unlike other elements such as carbon, nitrogen and sulphur. Therefore, option (c) is the correct answer.