What name is given to the removal of top soil by wind or water?

Explanation

**Step-by-Step Solution:**

1. **Understanding Topsoil**: Topsoil is the uppermost layer of soil that is rich in organic matter and nutrients. It is essential for plant growth as it contains the nutrients that plants need to thrive.

2. **Definition of Soil Erosion**: Soil erosion refers to the process by which the top layer of soil is removed or displaced from its original location. This can occur due to various natural forces, primarily wind and water.

3. **Causes of Soil Erosion**: The main agents responsible for soil erosion are wind and water. When strong winds blow or when water flows over the soil, they can carry away the topsoil, leading to erosion.

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