Categorise the following change into reversible or irreversible change.
Grain to its flour

Explanation

To categorize the change from grain to flour as reversible or irreversible, follow these steps:

### Step 1: Understand the Change
- Identify the initial state (grain) and the final state (flour).
- Recognize that the process involves grinding or milling the grain to produce flour.

### Step 2: Analyze the Reversibility
- Consider whether you can revert the flour back to its original state (grain).
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