How have nations in southeast asia have changed?

Southeast Asia or southeastern Asia is a subregion of aAsia, consisfing of the countries that are geographically south of china, east of india, west of new guinea and south Australia. The region lies near the intersection of geological plates, with heavy seismic and vocanic actively.

These islands/chinampas then provided rich soil for crops with easy access to water. i hope this is correct, im so sorry if its not !

Answership building; new england was almost entirely mercantilist