Ir is the third opinion, 100km area
Indentured servants. The headrights system allowed planters to be given 50 acres of land for every person they payed for to come over.
Answer:
Most major rivers in Southeast Asia seem to flow in the same direction. By studying the physical geography of this region, we can tell that these rivers flow from north to south because the major mountain ranges run from north to south. The rivers formed naturally between them in valleys.