Final answer:
Mammals vary in size from the equator to the poles, with larger animals being more common closer to the equator and smaller animals more common closer to the poles.
Step-by-step explanation:
Mammals vary in size from the equator to the poles. Larger animals tend to be found in warmer regions closer to the equator, while smaller animals are more common in colder regions closer to the poles. This can be seen through the adaptation of mammals to different climates and habitats. For example, animals like wooly mammoths evolved larger sizes to adapt to the cold of the poles, while other animals moved closer to the equator or became extinct.