### Step-by-Step Solution:
1. **Understanding Lenticels**: Lenticels are small openings found on the stems and branches of woody plants. They are involved in gas exchange.
2. **Evaluating the Options**:
- **Option A: Food Transport**: This option is incorrect because food transport in plants primarily occurs through phloem, not lenticels.
- **Option B: Photosynthesis**: This option is also incorrect. Photosynthesis mainly takes place in the leaves, specifically in the mesophyll tissues, not in lenticels.
- **Option C: Transpiration**: While lenticels can play a minor role in transpiration, the primary structures for transpiration are stomata found in leaves. Hence, this option is not the best answer.
- **Option D: Gaseous Exchange**: This is the correct option. Lenticels facilitate gaseous exchange in the stem, allowing oxygen and carbon dioxide to enter and exit the plant.
3. **Conclusion**: Based on the evaluation of the options, the correct answer is that lenticels are involved in gaseous exchange.
### Step-by-Step Solution:
1. **Understanding Lenticels**: Lenticels are small openings found on the stems and branches of woody plants. They are involved in gas exchange.
2. **Evaluating the Options**:
- **Option A: Food Transport**: This option is incorrect because food transport in plants primarily occurs through phloem, not lenticels.
- **Option B: Photosynthesis**: This option is also incorrect. Photosynthesis mainly takes place in the leaves, specifically in the mesophyll tissues, not in lenticels.
- **Option C: Transpiration**: While lenticels can play a minor role in transpiration, the primary structures for transpiration are stomata found in leaves. Hence, this option is not the best answer.
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