Give one example in each case
Change which occurs on cooling but can be reversed.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for an example of a change that occurs when a substance is cooled and can be reversed. This means we need to find a process where cooling leads to a change, but that change can be undone by applying heat.

2. **Identifying a Suitable Example**: A common example of a reversible change due to cooling is the transformation of water into ice.

3. **Describing the Process**:
- When water is cooled to a temperature below 0 degrees Celsius (freezing point), it changes from a liquid state to a solid state, forming ice.
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