Question

The duck billed platypus is one of the few egg-laying mammals remaining in the world. Like many unusual life forms, it is native to Australia, a country that is an island. Australia has many life forms not seen elsewhere in the world because the country

Answer 1

is separated from the rest of the world (this answer is correct if you had this question on USATESTPREP)

Answer 2

Australia has many life forms not seen elsewhere in the world because of continental drift.

Step-by-step explanation:

As Australia got separated from the other continent, its pouched mammals (marsupials) prevented from facing any threat or competition from the mammals of other continent and hence, they survived and diversified on the Australian land better.