Describe various stem modifications associated with food storage , climbing and protection.

Explanation

### Step-by-Step Solution

**Step 1: Introduction to Stem Modifications**
- Stem modifications are adaptations of the stem that serve specific functions in plants. These modifications can be categorized based on their purposes such as food storage, climbing, and protection.

**Step 2: Stem Modifications for Food Storage**
1. **Rhizome**:
- An underground modified stem that grows horizontally.
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