Rock Weathering in Biogeochemical Cycles

The phosphorus cycle is a sedimentary cycle where the primary natural reservoir is lithospheric rock. Weathering of these rocks releases phosphate ions directly into the soil and water bodies, making them available to plants. Carbon and nitrogen cycles are gaseous cycles primarily regulated by atmospheric reservoirs , while the sulfur cycle is hybrid but relies heavily on both atmospheric and sedimentary components. > The phosphorus cycle is strictly sedimentary, relying almost entirely on the chemical weathering of mineral rocks for nutrient release. Answer: (c).