A drawing sheet changes when you draw a picture on it. Can you reverse this change?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Change:**
- When you draw on a drawing sheet, the sheet changes from being plain to having a picture on it. This is a physical change where the appearance of the sheet is altered.

2. **Identifying the Drawing Tool:**
- The ability to reverse this change depends on the tool used for drawing. If a pen is used, the ink becomes permanent on the paper.

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