Rhizomes occur in plants such as ginger and banana.

Explanation

**Step-by-Step Solution:**

1. **Understanding Rhizomes**: Begin by defining what rhizomes are. Rhizomes are a type of underground stem modification found in certain plants.

2. **Identifying the Function**: Explain the primary function of rhizomes. They serve as food storage organs for the plant, storing nutrients such as carbohydrates and proteins.

3. **Examples of Plants**: Mention specific examples of plants that have rhizomes. In this case, ginger and banana are highlighted as common examples.

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