Anaemia is caused by lack of ...... and iron.

Explanation

**Step-by-Step Solution:**

1. **Understanding Anemia**: Anemia is a medical condition characterized by a deficiency of healthy red blood cells (RBCs) in the body. These cells are crucial for transporting oxygen to various tissues and organs.

2. **Identifying Causes of Anemia**: The primary causes of anemia include nutritional deficiencies, particularly the lack of certain vitamins and minerals.

3. **Key Nutrients Involved**: The two main nutrients that are often linked to anemia are:
- **Iron**: Essential for the production of hemoglobin, the protein in red blood cells that carries oxygen.
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