Answer:
Huge China is a country of contrasts. It consists of several climatic zones, there you can find a noisy city full of glass skyscrapers and smog, but also the traditional mountain village with mud houses and rice plantations.
I hope this helps with your work you’re welcome
Many settlers were willing to leave their homes and head west due to the dream of attaining a better life, usually thinking of the possibility of acquiring free or cheap land. Other ocassions were for example, the "gold rush" in which so many went to California in search of gold. Others went west hoping to find more freedom.
Plate tectonics is what you are referring to?
if you're asking what hindered the US from winning in Vietnam it was cause of multiple factors
first one and probably the biggest is that the war was unpopular back in the US most of the population found it to be a pointless war
second reason would be that the Soviets and us Chinese were training equipping and supporting the Viet Kong
third reason would be that the Viet Kong were excellent guerrilla fighters and knew the land better than the American GIs