Pneumatophores are uses in-

Options

A. Respiration
B. Transpiration
C. Photosynthesis
D. Protein synthesis

Answer

**Step-by-step solution:**

1. **Definition of Pneumatophores**: Pneumatophores are specialized root structures found in certain plants. They are a type of root modification.

2. **Environmental Context**: Pneumatophores are typically found in plants that grow in saline and marshy environments. These environments often have waterlogged soils, which can limit the availability of oxygen.

3. **Function of Pneumatophores**: The primary function of pneumatophores is to facilitate gas exchange. They have small pores (also known as lenticels) that allow for the exchange of gases, particularly oxygen and carbon dioxide.

4. **Role in Respiration**: The gas exchange that occurs through the pneumatophores is crucial for the process of respiration in the plant. Since the roots are submerged in waterlogged soil, the pneumatophores help the plant to obtain oxygen from the air.

5. **Conclusion**: Therefore, pneumatophores are primarily used in respiration, allowing plants in saline marshy environments to survive despite the low oxygen availability in their root zone.

**Final Answer**: Pneumatophores are used in the process of respiration.

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