Give an example : A deficiency disease

Explanation

**Step-by-Step Solution:**

1. **Understanding Deficiency Diseases:**
- A deficiency disease is a health condition that arises due to the lack of essential nutrients in the diet. These nutrients include vitamins and minerals that are crucial for the proper functioning of the body.

2. **Identifying Essential Nutrients:**
- Essential nutrients are dietary elements that the body cannot synthesize on its own and must be obtained from food. Common examples include vitamins (like A, C, D, and B complex) and minerals (like calcium and iron).

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