which of the following form dence mats on the soil and play major role in preventing soil erosion?

Options

A. Liverworts
B. Hornworts
C. Mosses
D. Algae

Answer

To solve the question regarding which organisms form dense mats on the soil and play a major role in preventing soil erosion, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which organisms form dense mats on the soil that help prevent soil erosion. We need to identify the correct group of organisms from the options provided.

2. **Identify Key Organisms**: The organisms in question are likely to be from the plant kingdom, particularly bryophytes, which include mosses, liverworts, and hornworts.

3. **Evaluate Bryophytes**:
- **Mosses**: Mosses are known to form dense mats or carpets on the soil. They grow closely together, creating a thick layer that binds soil particles. This structure helps to prevent soil erosion, especially on steep hillsides.
- **Liverworts and Hornworts**: These bryophytes do not form dense mats like mosses. They tend to grow in a more prostrate or erect manner, which does not effectively bind soil particles together.

4. **Consider Other Organisms**: The question may also include other groups like algae. However, algae do not typically form dense mats on soil; they are more aquatic and do not play a significant role in soil erosion prevention.

5. **Conclude the Answer**: Based on the evaluation, the correct answer is **mosses**, as they are the bryophytes that form dense mats on the soil and effectively prevent soil erosion.

### Final Answer:
**Mosses** are the organisms that form dense mats on the soil and play a major role in preventing soil erosion.