Final answer:
Bergmann's rule states that larger/heavier bodies are found in colder climates. This is because larger organisms have a greater surface area for their mass and lose heat at a faster rate than smaller organisms.
Step-by-step explanation:
Bergmann's rule suggests that a larger/heavier body will be found in colder climates. This rule is an ecogeographic rule that states that within a broadly distributed taxonomic group, populations or species of larger size are found in colder environments, whereas populations or species of smaller size are found in warmer environments. The relationship between body size and temperature is due to the fact that larger organisms have a greater surface area for their mass and therefore lose heat at a faster rate than smaller organisms.