Which adaptation mechanism is suggested by Bergmann's Rule for animals in different climates?

Bergmann's Rule posits that within a species, individuals in colder climates tend to have larger body sizes compared to those in warmer climates. This principle is based on the relationship between body size, heat retention, and surface area. Larger bodies have a smaller surface area-to-volume ratio, meaning they lose heat more slowly than smaller bodies, which is advantageous in colder environments.

In contrast, smaller bodies can dissipate heat more effectively, making them more suited to warmer climates where overheating is a concern. Therefore, body size variation is the adaptation mechanism highlighted by Bergmann's Rule, as it directly correlates with thermal regulation and survival in varying environmental conditions. Understanding this concept allows for a deeper appreciation of how species adapt to their respective habitats, showcasing the intricate relationship between biology and environment.