Which one is the edaphk factor in biosphere?

Options

A. Light
B. Temperature
C. Water
D. Soil

Answer

To determine which one is the edaphic factor in the biosphere, we need to analyze the options provided: light, temperature, water, and salt.

### Step-by-Step Solution:

1. **Understanding Edaphic Factors**:
- Edaphic factors refer to the environmental conditions related to soil. They include the physical, chemical, and biological properties of soil that influence the organisms living in it.

2. **Analyzing the Options**:
- **Light**: This is primarily a climatic factor, affecting photosynthesis and plant growth but not specifically related to soil.
- **Temperature**: Similar to light, temperature is a climatic factor that influences living organisms but does not pertain to soil properties.
- **Water**: While water is essential for life and can influence soil moisture, it is not classified as an edaphic factor itself.
- **Salt**: This can affect soil properties, especially in saline soils, but it is not the primary edaphic factor.

3. **Identifying the Correct Answer**:
- The correct answer is **soil**, as it encompasses the physical, chemical, and biological properties that directly influence organisms in the biosphere.

4. **Conclusion**:
- Therefore, the edaphic factor in the biosphere is **soil**.

### Final Answer:
The correct option is **soil**.

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