VII. List four natural barriers (obstacles) that hinder the economic development of Japan, describe two of them. VIII. Explain what the monsoon circulation is and how it affects the Asian climate.
Help ?

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years