Answer:
Pacific
Explanation:
The last regions of the world to be populated by the humans about 3500 ya is the Pacific region.
The region of the Pacific remain unknown to the rest of the world for a quite long time. It was in inhabitant and barren land, untouched from the rest of the world.
Humans migration occur to this land in the prehistoric period. Around 3000 BC, the people of Austronesia traveled and moved to this place as mentioned in the history.
