Animals have shorter and smaller extremities in colder areas.It is

Options

A. Allen's law
B. Cope's law
C. Bergmann's law
D. Dollo's law

Answer

To answer the question "Animals have shorter and smaller extremities in colder areas. It is," we need to identify which of the given laws explains this phenomenon. Let's analyze the options step by step.

### Step 1: Understand the Question
The question states that animals in colder areas have shorter and smaller extremities. We need to find a law that explains this adaptation.

### Step 2: Analyze the Options
1. **Dolo's Law**: This law states that evolution is not reversible. This does not relate to the size of extremities in animals based on climate.

2. **Bergman's Law**: This law states that warm-blooded animals in colder regions are generally bulkier than those in warmer regions. While it discusses body size, it does not specifically address extremities.

3. **Cope's Law**: This law suggests that evolution tends to increase body size over geological time. This is more about overall body size and does not pertain to extremities in relation to climate.

4. **Allen's Law**: This law states that animals adapted to colder climates have shorter limbs and extremities compared to those in warmer climates. This directly correlates with the question.

### Step 3: Identify the Correct Answer
Based on the analysis, the correct answer is **Allen's Law** (Option A), which explains that animals in colder climates have shorter extremities as an adaptation to conserve heat.

### Final Answer
**The correct answer is: A) Allen's Law.**

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