Answer:The Columbian Exchange refers to the exchange of diseases, ideas, food, crops, and populations between the New World and the Old World following the voyage to the Americas by Christo pher Columbus in 1492. The impact was most severe in the Caribbean.
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The Tiananmen Square protests were student-led demonstrations calling for democracy, free speech and a free press in China. They were halted in a bloody crackdown, known as the Tiananmen Square Massacre, by the Chinese government on June 4 and 5, 1989.
Pro-democracy protesters, mostly students, initially marched through Beijing to Tiananmen Square following the death of Hu Yaobang. Hu, a former Communist Party leader, had worked to introduce democratic reform in China. In mourning Hu, the students called for a more open, democratic government. Eventually thousands of people joined the students in Tiananmen Square, with the protest’s numbers increasing to the tens of thousands by mid-May.
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Answer:Competitive equilibrium is achieved when profit-maximizing producers and utility-maximizing consumers settle on a price that suits all parties. At this equilibrium price, the quantity supplied by producers is equal to the quantity demanded by consumers.
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