The Platypus does live in Eastern Australia
Platypus are native to Australia
There is only one species of platypus (Ornithorhynchus anatinus) so the kind you find in Eastern Australia and Tasmania is the same one you find everywhere else that it lives. (Of course Eastern Australia and Tasmania is about the only place you will find the platypus in the wild - and note that Tasmania is actually part of Australia.)
You would not use a platypus anywhere. However, you might encounter one in Australia.
One might find a platypus in nature in many different places. Some of the places that one might find a platypus in nature are: lakes and ponds in Australia.
In or near Australia. The platypus, an egg-laying mammal, is native to eastern Australia and Tasmania.
No. There are no antelope in Australia, which is the natural home of the platypus. Even if there were, it is highly unlikely that an antelope would wish to eat a platypus.
You cannot find a platypus in North America. Platypuses are endemic to the eastern states of Australia. They do not live anywhere else in the world.
The platypus is endemic to eastern Australia. It is not found in Western Australia at all.
No. The platypus is native to Australia. There have never been platypuses in Britain.
No. Bears are not found in Australia, which is the only continent on which the platypus lives.
The platypus is called the platypus wherever one happens to be in Australia.