What is the defining characteristic related to reproduction for tree-kangaroos as marsupials?

Answer

Females possess a pouch where underdeveloped young complete development after birth.

As marsupials, tree-kangaroos share the trait of giving birth to young that are underdeveloped, requiring them to complete their development inside the mother's specialized pouch.

What is the defining characteristic related to reproduction for tree-kangaroos as marsupials?
animalmammaltree kangarookangaroo