The human activity most widely viewed as changing the planet is the burning of fossil fuels. ... to melt, threatening water supplies for hundreds of millions of people. ... and phosphorus to the biosphere than would occur naturally. ... compounds that can remain active in the environment for thousands of years .
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Answer:
I believe that "a biography of John F. Kennedy" and "a letter written by Thomas Jefferson to the British monarch" go in primary and the other two go in secondary.
Answer:
B: The Mayflower compact stated that people have the right to self-government
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