South America can be divided into three physical regions: mountains and highlands, river basins, and coastal plains. Mountains and coastal plains generally run in a north-south direction, while highlands and river basins generally run in an east-west direction.
A. They started because of the lack of agricultural support in the south :))
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they both are considered to be a part of development. in most cases there will be a number of failure before number of success is achieved.
C
explanation
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U.S involvement in Mexico and Cuba resulted in the growth of revolutionary movements. Mexico was opposed to intervention from foreign influence. Cuba was also opposed to dominance from the United States and its revolutionary and communist government sought for international recognition