Thorn develops from

Options

A. Root
B. Leaf
C. Axillary bud
D. Peduncle

Answer

To answer the question "Thorn develops from," we need to analyze the options provided and understand the nature of thorns in plants.

### Step-by-Step Solution:

1. **Understanding Thorns**: Thorns are modified structures that serve as a form of protection for plants. They deter herbivores from feeding on the plant.

2. **Identifying the Origin of Thorns**: Thorns are not roots or leaves; they are modifications of the stem.

3. **Considering the Options**:
- **A. Root**: Roots do not develop into thorns. They primarily function in anchorage and absorption of nutrients and water.
- **B. Leaf**: While some plants have spines that are modified leaves, true thorns are not derived from leaves.
- **C. Axillary Bud**: This is a key point. Thorns can develop from axillary buds, which are located in the leaf axils (the angle between the upper side of the stem and a leaf).
- **D. Peduncle**: The peduncle is the stalk that supports a flower or fruit, and it does not develop into thorns.

4. **Conclusion**: Based on the analysis, thorns develop from the axillary bud.

### Final Answer:
**C. Axillary Bud**