Which of the following regulate soil formation?

Options

A. Rainfall
B. Temperature
C. Wind
D. All of the above

Explanation

To answer the question "Which of the following regulate soil formation?", we will follow these steps:

### Step 1: Understand the Question
The question is asking about the factors that influence or regulate the process of soil formation.

### Step 2: Identify the Options
The options provided are:
- A) Rainfall
- B) Temperature
- C) Wind
- D) All of the above

### Step 3: Analyze Each Option
- **Rainfall**: Rainfall contributes to soil formation by facilitating weathering processes. It helps in the breakdown of rocks and minerals, which is essential for soil development.

- **Temperature**: Temperature affects the rate of chemical reactions and biological activity in the soil. It plays a crucial role in weathering and soil formation.

- **Wind**: Wind can contribute to soil erosion and the distribution of soil particles. It can also aid in the weathering process by transporting materials.

### Step 4: Conclusion
Since all three factors (rainfall, temperature, and wind) play significant roles in the weathering process, which is essential for soil formation, the correct answer is:
**D) All of the above**

### Final Answer
The factors that regulate soil formation are rainfall, temperature, and wind. Therefore, the answer is D) All of the above.

---