Lithosphere is reservoir of

Options

A. Carbon
B. Oxygen
C. Phosphorus
D. Nitrogen

Explanation

**Step-by-Step Solution:**

1. **Understanding the Layers of the Earth**: The Earth is composed of four main layers: lithosphere (land), hydrosphere (water), biosphere (living organisms), and atmosphere (air).

2. **Defining Lithosphere**: The lithosphere is the rigid outer layer of the Earth, which includes the crust and the uppermost part of the mantle.

3. **Identifying Reservoirs**: Each layer of the Earth serves as a reservoir for different elements. For example, the atmosphere is a major reservoir for carbon and nitrogen, while oxygen is found in both the atmosphere and lithosphere.

4. **Focusing on Phosphorus**: The lithosphere is specifically known to be a reservoir for phosphorus. This element is primarily stored in sedimentary rocks found within the lithosphere.

5. **Understanding the Phosphorus Cycle**: The cycle through which phosphorus moves through the lithosphere is referred to as the sedimentary cycle. Unlike carbon and nitrogen, which have significant atmospheric reservoirs, phosphorus does not have a gaseous phase and primarily cycles through geological processes.

**Final Answer**: The lithosphere is a reservoir of phosphorus.

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