_________ is caused by the deficiency of vitamin D.

Explanation

**Step-by-Step Solution:**

1. **Identify the Vitamin**: The question asks about a disease caused by the deficiency of vitamin D.

2. **Understand the Sources of Vitamin D**: Vitamin D can be obtained from various sources such as sunlight, fish, and red meat.

3. **Recognize the Disease**: The deficiency of vitamin D leads to a specific disease known as rickets.

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