A symbiotic association between fungus and underground part of plant is

Options

A. Hyperparasite
B. Mycorrhiza
C. Endophyte
D. Subterranean parasite

Answer

To solve the question regarding the symbiotic association between fungus and the underground part of a plant, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a specific type of symbiotic relationship involving fungus and the underground part of a plant.

2. **Analyze the Options**:
- **Hyperparasite**: This term refers to a parasite that feeds on another parasite. This does not relate to the symbiotic relationship between fungus and plants.
- **Mycorrhiza**: This term combines "myco," meaning fungus, and "rhiza," meaning roots. Mycorrhiza refers to the beneficial association between fungi and plant roots, where both organisms benefit.
- **Endophyte**: This refers to organisms that live inside a plant for at least part of their life cycle. While it involves a plant-fungus relationship, it does not specifically refer to the underground parts.
- **Subterranean Parasite**: This term describes parasites that live in the soil and may attach to roots, but it does not indicate a mutualistic relationship.

3. **Identify the Correct Answer**: From the analysis, the option that best describes the symbiotic association between fungus and the underground part of a plant is **Mycorrhiza**.

4. **Conclusion**: Therefore, the answer to the question is **Mycorrhiza**, as it specifically refers to the mutualistic relationship between fungi and the roots of plants, aiding in nutrient and water absorption.

### Final Answer: Mycorrhiza

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