Hi there! My question is: What was the cause of the Native American tribes to seperate?

Hey there!

American settlers who wanted to expand into the south and west, pressured the government to remove the Native Americans away from their land into the present day states of Oklahoma, Arkansas, and Missouri. The Native Americans were forced to leave their homes and travel many hundreds of miles to their new ones, many dying on the way there.

Hope this helps :)

north east because it has more forest

its many islands, high mountains, and remote peninsulas isolated population centers.