(c) They carry young ones in pouches
Marsupials are the mammal of an order whose members are born incompletely developed and are typically carried and suckled in a pouch on the mother's belly.
The distinctive characteristic of 'Marsupials' is that they carry their young ones in pouches.
They take their name Marsupials from the word 'Marsupium' means pouch which protects eggs, offspring, or reproductive structures.
The main examples of Marsupials animals are kangaroos, wallabies, koalas, possums, opossums, wombats, and Tasmanian devils.