Constantinople was able to survive due to its <em>strategic</em> location and <em>sofisticated</em> system of fortifications.
Constantinople was able to survive as the <em>central</em> hub of the European culture throughout the early 1000s due to its strategic location, the city was located in a strait between the Black and Mediterranean Seas, between Europe and Asia, which allowed the city to be prevented from many invaders, from Hunes to Arabs.
In addition, the city counted with a sophisticated system of fortifications which made impossible any attempt of siege until the appearance of first developments on modern artillery in the 15th Century, and the city was well communicated with the most important nations in Eastern and Western Europe by sea (i.e. Italy, Carolingian Empire, Kiev' Rus), of which the city may receive reinforcements in desperate situations.
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Because the earth's climate is CONSTANTLY in flux and what today is a desert was once a tropical forest.
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According the the Homestead Act of 1862, the only two valid answers are A. Settlers had to promise to avoid contact with American Indian tribal lands and D. Settlers had to improve the land (e.g., by buying a house) to keep it.
The British colonisation in North America were the 13 colonies north east coast and they were divided in to 3 different colonies New England,Middle, and Southern they all left England to search for a better life.
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Most definitely! However, that doesn't mean it will solve problems in the future. Understanding a nations' history of what worked and what did not work is very valuable to solving problems and maitning unity as a nation. Just remember this is a subjective answer. : )
