Feed on mothers- mammals only animals that take care of their young.
Warm blood- They live in warm places and can stand the heat.
Fur all over- only mammals have fur.
Marsupial pouch- Where their young stay to feed and grow.Live young- Mammals are the only animals that do not lay eggs.
These animals are put in this order because of these characteristics, -Warm blooded, -have fur all over their body, -feed on their mother, -marsupial pouch, -live young not eggs.