Water is needed to start farms. they could also ship goods with the river. I know my answer is not well but I hoped it helped
Physical, such as mountains rivers lakes, etc. and/ or political maps of reigons are divided by boundaries.
Bolivia, the fourth-largest tin producer, has traditionally been a mining country-the answer is tin
It reflect on their history because their great great might have used it as a secret language and it afect them because they speak it like I am Haitian and I speak creole