The continents look like that because they use to be a SUPER-CONTINENT called PANGAEA.
the earths continents are the same ..
Like earth and islands.
The edges of some continents look as if they would fit together like pieces of a puzzle.
Have a look at this site http://thecontaminated.com/earth-at-night-continents/
Asia , i am guessing
they are the giant plates underneath all the continents
Australia is the only one
Antarctica and Australia
Bahrain and Australia
a bit like the continents now just closer and twisted
Bahrain and Australia
to put them together like a puzzle or to look at the fossils that are found in 3 different continents