why are animals shaped differently in cooler climates than in warmer ones?
2 answers
Animals in cooler climates need more fat to keep them warm.
Not all animals are shaped differently in cooler climates that in warmer ones. Some may look very similar, but have a shorter season of activity. Ms. Sue is correct in pointing out that for warm blooded animals, insulation in cooler climates is important, and this may be achieved through fatty tissue, or fur, or feathers.