Which of the following biogeochemical processes has no atmospheric

Correct answer: D) Phosphorous cycle.
The phosphorus cycle is primarily a terrestrial and aquatic cycle, with no significant atmospheric component. Phosphorus is cycled through the environment via weathering of rocks, uptake by plants, consumption by animals, and decomposition. It is transported in water bodies and sediments, but does not have a significant gaseous phase like the water, carbon, and nitrogen cycles.

In contrast, the water, carbon, and nitrogen cycles all have important atmospheric components, where these elements are cycled through the atmosphere in the form of gases such as water vapor, carbon dioxide, and nitrogen compounds.