Cycling of elements in an ecosystem is called Or Which of the following cycle would be affected if decomposers of an ecosystem vanish

Options

A. A) Chemical cycle
B. B) Biogeochemical cycle
C. C) Geological cycle
D. D) Geochemical cycle

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the cycling of elements in an ecosystem and specifically inquires about the impact of the disappearance of decomposers on these cycles.

2. **Identifying Key Terms**:
- **Cycling of Elements**: This refers to the movement and transformation of essential elements (like carbon, nitrogen, phosphorus, etc.) through biotic (living organisms) and abiotic (non-living environment) components of the ecosystem.
- **Decomposers**: These are organisms (like bacteria and fungi) that break down dead organic matter, returning nutrients to the soil and facilitating nutrient cycling.

3. **Linking Decomposers to Biochemical Cycles**:
- Decomposers play a crucial role in the biochemical cycles by breaking down organic matter, which releases nutrients back into the ecosystem. This process is essential for maintaining the balance of these cycles.

4. **Impact of Decomposer Vanishing**:
- If decomposers vanish, the breakdown of organic matter will cease. This will lead to a buildup of dead material and a depletion of nutrients in the soil, disrupting the biochemical cycles.

5. **Conclusion**:
- The cycling of elements in an ecosystem is referred to as the **biochemical cycle**. Therefore, if decomposers vanish, the biochemical cycles will be significantly affected.

6. **Final Answer**: The correct answer is **Option B: Biochemical Cycle**.