How prices serve as an incentive in a market economy is whenever there is a decline in the supply of a particular commodity, what the suppliers do is increase the prices, and in contrast, when there is enough supply, they decrease the prices as well. Hope this answers your question.
The war in North America was called King George's war. It happened because as Europeans fought each other, the fighting also transferred to the colonies and this war became the third of the 4 French-Indian wars.
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Im assuming that you are asking about the Constitution. Article 2 section 4 of the Constitution literally says, “The President, Vice President and all civil officers of the United States, shall be removed from office on impeachment for, and conviction of, treason, bribery, or other high crimes and misdemeanors.”