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Extremities, tail and ear are relatively shorter in animals living in cooler regions as compared to those inhabiting warmer zones. This is

1. Bergman’s Rule
2. Jordan’s Rule
3. Gloger’s Rule
4. Allen’s Rule

Correct answer: Allen’s Rule

Solution

Allen’s Rule states that animals in colder climates tend to have shorter ears, tails, and limbs to reduce surface area and conserve heat. That matches the description of relatively shorter extremities in cooler regions.

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