Which subgroup of mammals raises their young in pouches?

Question

Quizplus · Accepted Answer

Marsupials are a unique group of mammals that give birth to underdeveloped young that continue to develop outside of the mother's body in a pouch. Examples of marsupials include kangaroos, koalas, and opossums. Monotremes, such as platypuses and echidnas, lay eggs and do not have pouches. Eutherians, or placental mammals, do not have pouches and instead develop fully inside the mother's body before birth. Cetaceans, such as dolphins and whales, give birth to fully developed young that swim alongside the mother.

Which Subgroup of Mammals Raises Their Young in Pouches