Why did the first inhabitants of mainland southern Asia settle in the plains and river valley
The first inhabitants of mainland southern Asia settled in the plains and river valleys for a few reasons:
1. Fertile land: These areas had rich soil due to the frequent flooding of rivers, which deposited nutrient-rich sediment onto the land. This allowed for the growth of crops, which was crucial for survival.
2. Water source: The presence of rivers and other water sources in these areas provided the inhabitants with a reliable source of water for drinking and irrigation.
3. Transportation: Rivers also provided a means of transportation, making it easier for people to move goods and travel to different areas.
4. Protection: The flat terrain of the plains made it easier for people to defend themselves against invading armies or wild animals.
Overall, the plains and river valleys provided the first inhabitants of southern Asia with the necessary resources for survival and development of early civilizations.