The magma that rises out of them cools eventually, with some help from the water. eventually all the cooled magma builds up into an island.
The geographic term “Asia” was originally used by ancient Greeks to describe the civilizations east of their empire. Ancient Asian peoples, however, saw themselves as a varied and diverse mix of cultures—not a collective group. Today, the term “Asia” is used as a cultural concept, while subregion classifications describe the distinct geopolitical identities of the continent. These classifications are Western Asia, Central Asia, Southern Asia, Eastern Asia, Southeastern Asia, and Northern Asia.
The thing responsible for the plate motion is plate tectonics.
I believe a=128/15
I hope this helped a bit~
