What are the names of the three regions that comprise oceania

Oceania are the islands throughout the Pacific Ocean.
The three regions that comprise Oceania are: Micronesia, Melanesia and Polynesia. All these are island regions.
Micronesia is a group of small islands in the western Pacific Ocean.
Melanesia is the group of islands from New Guinea island in the southwestern Pacific Ocean to the Arafura Sea.
Polynesia is a group of islands scattered over the central and southern Pacific Ocean.

Why the planet stays in orbit is because of inertia (object stays in motion until a force changes it’s motion) also the atmosphere and gravity!

When the indian plate collided with eurasian plate because it was cool