The main reason why is because of Global Trade.
They are Cyanobacteria from Australia.
One such area is the circum-Pacific Ring of Fire , where the Pacific Plate meets many surrounding tectonic plates. The Ring of Fire is the most seismically and volcanically active zone in the world.
There will be more space for other people, but there could be more wars or stuff alike because people will fight for places.
(I’m not sure that’s how I’ll answer it)
Yes the answer is correct