Use 2 different breeds of animals explain their variations make them more suitable to adapt?

Question

Using two different breeds of cats,dogs,or horses,explain how their variations make them more suitable to adapt to their specific success in their environment.

Answer 1

St Bernard: Big dog with a thick coat and ability to build up a lot of subcutaneous fat (for insulation)  for the climate in which it lives (not sure if this breed has oily skin)?

Australian shepherd: low-to the ground bone structure and built-in herding (not hunting) instinct