Rail road companies facilitated settlement of the Great Plains because it provided a means of transportation for settlers to get to the location. The government had also provided land to these companies which they sold at an affordable cost to the new settlers. The area was a large expanse of flat lang making it easy for newcomers to establish agriculture. <span />
Early people in what is now southern Chile relied on shellfish and seals for food because they were mostly hunter-gatherers, and some of the tribes were oriented towards hunting and gathering in the coast, while others were more oriented towards the land. The tribes that were in the coast hunted fish, sea birds, otters, seals, whales and shellfish in winter, because that's what they had avaible to them.
Civilization in each region developed advance math,science, and engineering.
