The manufacture of which of the following materials on a large scale is a cause of soil erosion ? A. Plastics B. Paper C. Polyester D. Plywood

Options

A. A and B
B. B and C
C. B and D
D. Only D

Answer

To determine which of the materials listed causes soil erosion when manufactured on a large scale, we will analyze each option step by step.

### Step 1: Understand Soil Erosion
Soil erosion is the process where the upper layer of soil is worn away, often leading to a decrease in soil fertility and quality. It can be caused by various human activities, including deforestation and industrial processes.

**Hint:** Think about how the removal of trees or vegetation can affect the soil.

### Step 2: Analyze Each Option
- **A. Plastics:** The production of plastics primarily leads to soil pollution due to non-biodegradable waste. It does not directly cause soil erosion.

**Hint:** Consider how plastics interact with the soil and whether they involve the removal of vegetation.

- **B. Paper:** The manufacturing of paper requires cutting down trees, which leads to deforestation. This removal of trees can significantly contribute to soil erosion as there are fewer roots to hold the soil in place.

**Hint:** Reflect on the relationship between trees and soil stability.

- **C. Polyester:** Polyester is a synthetic material. Its production does not involve the direct removal of vegetation or trees, so it does not contribute to soil erosion.

**Hint:** Think about whether the production process of polyester affects the land or vegetation.

- **D. Plywood:** Plywood is made from wood, which requires cutting down trees. Similar to paper, this deforestation can lead to soil erosion due to the loss of root systems that stabilize the soil.

**Hint:** Consider how the extraction of wood for plywood impacts the environment.

### Step 3: Conclusion
Based on the analysis, both paper and plywood production lead to soil erosion due to deforestation. Therefore, the materials that cause soil erosion on a large scale are:
- **B. Paper**
- **D. Plywood**

### Final Answer
The correct options are **B (Paper)** and **D (Plywood)**.

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