Koalas, the cuddly looking animals from eastern Australia, live in eucalyptus trees. When not climbing or napping in the trees, they are eating the leaves. A mother koala carries her baby for about six months in a pouch, much as a kangaroo mother carries her young. When the infant is old enough to come out of the mother’s pouch, it hangs on to her belly or catches a ride on her back. Which detail from the text supports Kristi’s analysis that koalas are a unique kind of mammal?