What is the difference between th spiny anteater and the koala based on their reproduction?

The spiny anteater, or echidna, is a monotreme, meaning it lays eggs, while the koala is a marsupial that gives birth to live young. After hatching, echidna young, called puggles, are carried in a pouch-like structure until they are mature enough to survive outside. In contrast, koala joeys crawl into their mother's pouch shortly after birth, where they continue to develop and nurse for several months. This fundamental difference highlights the distinct reproductive strategies of these two unique Australian mammals.