Explain how both the European powers and the people of Africa were impacted by the Berlin Conference and the Scramble for Africa.

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof

oil! is what i am assuming

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.