Volcano eruption disturbs

Options

A. Phosphorus cycle
B. Nitrogen cycle
C. Carbon cycle
D. Sulphur cycle

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which cycle is disturbed by a volcanic eruption among the options provided: Phosphorous Cycle, Nitrogen Cycle, Carbon Cycle, or Sulphur Cycle.

2. **Identifying the Impact of Volcanic Eruptions**: Volcanic eruptions can have significant effects on ecosystems. They can destroy habitats, release gases and ash, and affect the soil composition.

3. **Analyzing Each Cycle**:
- **Phosphorous Cycle**: This cycle is primarily dependent on the movement of phosphorous through living organisms and the soil. If an eruption occurs, it can kill plants and animals, disrupting the cycle significantly.
- **Nitrogen Cycle**: This cycle involves nitrogen fixation by bacteria and is less directly impacted by volcanic eruptions since nitrogen can be recycled through the atmosphere and soil.
- **Carbon Cycle**: The carbon cycle is also resilient to disturbances like volcanic eruptions as carbon can be released into the atmosphere and absorbed by plants.
- **Sulphur Cycle**: While volcanic eruptions can release sulphur dioxide, the overall cycle is not as heavily reliant on living organisms as the phosphorous cycle.

4. **Conclusion**: Given the analysis, the Phosphorous Cycle is the most affected by volcanic eruptions due to its reliance on living organisms for its movement and cycling. The destruction of these organisms can lead to a significant disruption in the cycle.

5. **Final Answer**: Therefore, the correct answer is the **Phosphorous Cycle**.

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