This is an example of 'escape in space' to avoid stressful external conditions

Options

A. Migration
B. Aestivation
C. Hibernation
D. Diapause

Answer

To solve the question regarding the example of 'escape in space' to avoid stressful external conditions, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for an example of 'escape in space', which refers to a strategy organisms use to avoid stressful external conditions.

2. **Analyzing Option A - Migration**:
- Migration is the seasonal movement of animals from one region to another.
- It is often used to escape unfavorable weather conditions, such as extreme cold or heat.
- However, migration is more about movement over long distances rather than a strategy of 'escape in space' as defined in the question.
- **Conclusion**: This option is incorrect.

3. **Analyzing Option B - Activation**:
- Activation, also known as summer sleep, is a state that some animals enter to cope with high temperatures, particularly in desert environments.
- It allows animals to conserve energy during periods of extreme heat.
- While it helps in avoiding stressful conditions, it does not fit the definition of 'escape in space'.
- **Conclusion**: This option is incorrect.

4. **Analyzing Option C - Hibernation**:
- Hibernation is a state of inactivity and metabolic depression in animals during winter months.
- It helps animals survive cold temperatures by entering a state of dormancy.
- Although it is a form of escape from cold conditions, it is not an example of 'escape in space'.
- **Conclusion**: This option is incorrect.

5. **Analyzing Option D - Diapause**:
- Diapause is a period of suspended development in an organism, often in response to unfavorable environmental conditions.
- It is a strategy used by many insects and some other organisms to survive extreme conditions such as drought or extreme temperatures.
- This is a clear example of 'escape in space' as it allows organisms to avoid stressful external conditions by pausing their life processes.
- **Conclusion**: This option is correct.

### Final Answer:
The correct answer is **Option D - Diapause**.

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