Answer: Through trade with other countries
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The main reason behind the formation of North Atlantic Treaty Organization (NATO) was to defend themselves against Soviet aggression. It was a treaty that was created by United States of America along with Canada and several western European Nations. The treaty was created in the year 1949.
NATO was the first peace time alliance between several
countries along with United States of America. The Second World War had
devastated several European countries economically and they did not want the
Soviets to take advantage of this position.
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He got the France to join him in the war
Option C. Columbus underwent deep voyages and discovered the present day America. He also discovered the marine route which associated the old Eastern world to the new Western world.
After the establishment of Sea route there was exchange of goods with other countries started. But the negative impact was that people of Eurasia were not healthy with high levels of immunity.
The interchange of food supplies also initiated the arrival of dangerous diseases too and major part of the European, native American and Asian population died causing shortage of human labor, this gradually lead to the slavery of Africans.