Biotic component of biosphere is not constituted by

Options

A. producers
B. consumers
C. decomposer
D. air

Explanation

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which component is NOT part of the biotic components of the biosphere. Biotic components refer to living organisms.

2. **Identify Biotic Components**: Biotic components include:
- **Producers**: These are organisms like plants that produce their own food through photosynthesis.
- **Consumers**: These are organisms that consume other organisms for energy, including herbivores, carnivores, and omnivores.
- **Decomposers**: These are organisms such as fungi and bacteria that break down dead organic matter, returning nutrients to the ecosystem.

3. **Analyze the Options**:
- **Option A: Producers** - These are living organisms (plants) and thus biotic.
- **Option B: Consumers** - These are also living organisms that consume other organisms, making them biotic.
- **Option C: Decomposers** - These are living organisms that decompose dead matter, hence they are biotic.
- **Option D: Air** - Air is a mixture of gases and does not consist of living organisms; therefore, it is abiotic.

4. **Conclusion**: Since air is the only option that does not consist of living organisms, it is the correct answer to the question.

### Final Answer:
The biotic component of the biosphere is not constituted by **Air**.

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