What happens if the skin of earthworm dries 

Options

A. It dies due to the lack of respiration
B. It moves deep into burrows
C. It remains near the opening of burrow
D. It leaves the burrow

Answer

### Step-by-Step Solution:

1. **Understanding Earthworm Respiration**: Earthworms breathe through their skin, a process known as cutaneous respiration. This means that gas exchange (oxygen and carbon dioxide) occurs directly through the moist surface of their skin.

2. **Role of Moist Skin**: The skin of an earthworm is highly vascularized, meaning it has a rich supply of blood vessels. This vascularization is crucial because it allows for efficient gas exchange. The moisture on the skin facilitates the diffusion of gases.

3. **Effect of Dry Skin**: If the skin of an earthworm dries out, the process of cutaneous respiration is severely hindered. Without moisture, the skin cannot facilitate gas exchange, leading to a lack of oxygen and an accumulation of carbon dioxide in the earthworm's body.

4. **Consequences of Dry Skin**: The primary consequence of the skin drying out is that the earthworm will die due to a lack of respiration. This is the most critical outcome, as respiration is essential for survival.

5. **Other Options Considered**: While the question presents other options (like moving deeper into burrows or leaving the burrow), these are incorrect because the main issue is the inability to respire, which ultimately leads to death.

6. **Conclusion**: Therefore, the correct answer to the question is that the earthworm dies due to lack of respiration if its skin dries.