What is the peculiarity of nature in Australia and how is it explained?

Australia is located at the intersection of the Indian and Pacific Oceans. The continent on which Australia is located is located on the Precambrian platform, the formation of which took place 3 billion years ago. In addition to the mainland, Australia includes the large island of Tasmania and a large number of small islets. Due to the long period of isolation from other continents, unique species of animals are found in Australia, such as kangaroos, koalas, echidnas, and platypuses.

The climate in Australia is quite arid, and therefore the flora is represented by arid tree species that have a strong root system (eucalyptus, succulent trees).