Which of the following soil is transported by air?

Options

A. Alluvial
B. Colluvial
C. Glacial
D. Eolian

Answer

To determine which type of soil is transported by air, we can analyze the options provided:

1. **Alluvial Soil**: This soil is formed by the deposition of sediments carried by water, typically found in river valleys. It is not transported by air.

2. **Colluvial Soil**: This type of soil is formed from the accumulation of materials that have moved down slopes due to gravity, such as landslides. It is also not transported by air.

3. **Glacial Soil**: This soil is created from the materials deposited by glaciers. It is formed through the movement of ice and is not transported by air.

4. **Aeolian Soil**: This soil is specifically defined as soil that is transported by wind. It is formed when wind erodes and carries particles from one location to another, leading to deposition in a different area.

Based on this analysis, the correct answer is **Aeolian Soil**.

### Step-by-Step Solution:
1. **Identify the Types of Soil**: List the four types of soil mentioned in the question: Alluvial, Colluvial, Glacial, and Aeolian.

2. **Analyze Alluvial Soil**: Understand that alluvial soil is deposited by water, particularly in riverbanks, and is not moved by air.

3. **Analyze Colluvial Soil**: Recognize that colluvial soil is formed from materials that move downhill due to gravity, such as during landslides, and is not transported by air.

4. **Analyze Glacial Soil**: Realize that glacial soil is formed from materials deposited by glaciers and is also not moved by air.

5. **Analyze Aeolian Soil**: Conclude that aeolian soil is specifically transported by wind, making it the only type of soil in the list that fits the criteria of being moved by air.

6. **Select the Correct Answer**: Based on the analysis, select **Aeolian Soil** as the correct answer.