Decomposers like fungi and bacteria are

Options

A. autotrophs
B. heterotrophs
C. saprotrophs
D. chemo-autotrophs.

Explanation

**Step-by-Step Solution:**

1. **Understanding Decomposers**: Decomposers are organisms that break down dead and decaying organic matter. They play a crucial role in the ecosystem by recycling nutrients.

2. **Identifying the Organisms**: The question specifically mentions fungi and bacteria, which are well-known decomposers.

3. **Analyzing the Options**:
- **Autotrophs**: These are organisms that produce their own food using sunlight (e.g., plants). This does not apply to fungi and bacteria.
- **Heterotrophs**: These organisms depend on other organisms for food. While fungi and bacteria do fall under this category, it is not the most specific term for them.
- **Saprotrophs**: This term specifically refers to organisms that obtain nutrients by feeding on dead and decaying matter. This accurately describes the role of fungi and bacteria in the ecosystem.
- **Chemoautotrophs**: These organisms produce their own food using chemical reactions, which does not apply to fungi and bacteria in the context of decomposition.

4. **Choosing the Correct Answer**: Given that fungi and bacteria feed on dead and decaying matter, the most accurate answer is **saprotrophs**. Therefore, the correct answer is option C.

5. **Conclusion**: Fungi and bacteria are classified as saprotrophs because they decompose organic material and recycle nutrients back into the ecosystem.

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