What is the underlying geologic explanation for why western south america is so different from eastern south america?

What was the most difficult obstacle to overcome in the creation of an autonomous state after indian independence was achieved? a british willingness to go to war to retain the region b. religious differences between hindus and muslims c. ethnic differences between tribal regions d. indian princes' inability to decide on a format of government

What are the percentages of the large near earth asteroids that we have found so far?

How might the effects of el niño impact forests in the united states? a) it could cause hurricanes that would destroy forests in oregon. b) it could cause droughts which would make forest fires more likely. c) it could cause an increase in mold that could kill large amounts of trees. d) it could cause an increase in the length of the wet, rainy seasons in the northwest.