Name and describe briefly a method which can be helpful in separating a mixture of husk from grains. What is the principle of this method?

Explanation

**Step-by-Step Solution:**

1. **Identify the Mixture**: The mixture consists of husk and grains. Husk is the outer covering of grains and is lighter in weight compared to the grains.

2. **Select the Separation Method**: The method suitable for separating husk from grains is called **wind winnowing**.

3. **Explain the Principle**: The principle behind wind winnowing is based on the difference in weight between the two components. Lighter particles (husk) can be separated from heavier particles (grains) by the action of wind.

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