According to Bergmann's rule ,the mammals from cold climate have

Options

A. larger body short extremities.
B. larger body and extremities
C. Shorter body and extremities
D. Shorter body and larger extremities

Answer

### Step-by-Step Solution:

1. **Understanding Bergmann's Rule**: Bergmann's rule states that within a species of warm-blooded animals, those living in colder climates tend to have larger body sizes compared to those in warmer climates. This is because a larger body size helps retain heat more effectively.

2. **Analyzing the Options**: The question provides four options regarding the characteristics of mammals from cold climates:
- Option 1: Larger body and short extremities
- Option 2: Larger body and extremities
- Option 3: Shorter body and extremities
- Option 4: Shorter body and larger extremities

3. **Identifying Key Features**: According to Bergmann's rule, mammals in cold climates will have:
- A larger body size to conserve heat.
- Shorter extremities (like legs and ears) to minimize heat loss. Extremities are parts of the body that can lose heat, so shorter ones help retain warmth.

4. **Selecting the Correct Option**: Based on the understanding of Bergmann's rule, the correct option is:
- **Option 1: Larger body and short extremities**.

5. **Conclusion**: Therefore, mammals from cold climates, according to Bergmann's rule, have a larger body and shorter extremities.