What are mycorrhizae ?

Explanation

### Step-by-Step Solution:

1. **Definition of Mycorrhizae**: Mycorrhizae are a type of fungi that establish a symbiotic relationship with the roots of higher plants.

2. **Nature of the Association**: This relationship is termed a "symbiotic association," meaning that both the fungi and the plants benefit from this interaction.

3. **Role of Fungi**: The primary role of the fungi in this relationship is to absorb phosphorus from the soil. Phosphorus is an essential nutrient that plants require for their growth and development.

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