Adaptation may be

Options

A. behavioural
B. morphological
C. physiological
D. all of these

Explanation

**Step-by-Step Solution:**

1. **Understanding Adaptation**: Adaptation refers to the modifications or characteristics in an organism that enhance its survival and reproduction in a specific environment.

2. **Types of Adaptation**: Adaptations can be categorized into three main types:
- **Behavioral Adaptation**: These are actions or behaviors that organisms exhibit to survive in their environment. For example, reptiles like lizards bask in the sun to regulate their body temperature since they are cold-blooded and cannot maintain a constant body temperature.
- **Morphological Adaptation**: These are physical features or structures that help an organism survive. For instance, camels have elongated limbs and thick eyelashes to protect their eyes from sand and to move efficiently in desert conditions.
- **Physiological Adaptation**: These involve internal body processes that help organisms cope with environmental changes. An example is humans sweating to cool down when exposed to high temperatures, which is a physiological response to heat.

3. **Conclusion**: Since adaptations can be behavioral, morphological, or physiological, the correct answer to the question is that adaptation may be all of these.

4. **Final Answer**: The correct option is D. All of these.

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