Nthe early 1800s, why was there so little settlement on the great plains?

What were the 2 main reasons why the chinese came to america ?

Aman wearing warm clothes in a cold place would be an example of how humans adapt to their environment. affect their environment. can change their environment. choose where to live.

If one thinks illegal immigrants should become american citizens, should they become american citizens automatically or should there be a waiting period? if there should be a waiting period, explain why.