Which of the following options exemplifies a behavioural means of homeostasis ?

Options

A. A man sweating profusely in a hot room
B. A rhino convering itself inmub to keep cool
C. A desert lizard basking in Sun to increase its body temperature
D. Both (b) and (c)

Explanation

To solve the question regarding which option exemplifies a behavioral means of homeostasis, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Homeostasis**: Homeostasis refers to the ability of an organism to maintain a stable internal environment despite external changes. Key aspects include regulating body temperature and osmotic concentration.

2. **Identify Types of Adaptations**: Adaptations can be classified into three main types:
- **Morphological Adaptations**: Physical changes in structure.
- **Physiological Adaptations**: Internal processes that help maintain homeostasis.
- **Behavioral Adaptations**: Actions taken by organisms to adjust to their environment.

3. **Analyze the Given Options**:
- **Option A**: A man sweating profusely in a hot room.
- This is a physiological adaptation because sweating is an involuntary response to regulate body temperature.
- **Option B**: A rhino covering itself in mud to keep cool.
- This is a behavioral adaptation. The rhino consciously chooses to cover itself in mud to lose excess body heat.
- **Option C**: A desert lizard basking in the sun to increase its body temperature.
- This is also a behavioral adaptation. The lizard actively seeks sunlight to warm up when its body temperature drops.
- **Option D**: Both B and C.
- This option combines the behavioral adaptations from options B and C.

4. **Select the Correct Answer**:
- Since options B and C are both examples of behavioral adaptations that help maintain homeostasis, the correct answer is **Option D: Both B and C**.

### Final Answer:
**Option D: Both B and C** exemplifies behavioral means of homeostasis.