Edaphic factor refers to

Options

A. Water
B. soil
C. relative humidity
D. altitude

Explanation

**Step-by-Step Solution:**

1. **Understanding Edaphic Factor**: The term "edaphic factor" is used in ecology to describe certain environmental conditions that affect living organisms, particularly in relation to soil.

2. **Identifying the Type of Factor**: Edaphic factors are classified as abiotic factors, meaning they are non-living components of the environment that influence ecosystems.

3. **Relation to Soil**: Edaphic factors specifically pertain to the physical and chemical properties of soil. This includes aspects such as soil texture, pH, nutrient content, moisture levels, and organic matter.

4. **Analyzing the Options**: The question provides four options:
- a) Water
- b) Soil
- c) Relative humidity
- d) Altitude

5. **Selecting the Correct Option**: Since edaphic factors are directly related to soil properties, the correct answer is option **b) Soil**.

**Final Answer**: Edaphic factor refers to **soil**.

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