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<u>B. Lithium, because it has two energy levels with one electron in the second level.</u>
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The tundra ecosystem is one of the coldest ecosystem on the earth, which has few trees, high winds, much snow, and low rainfall. Some of the species found in that environment are arctic foxes, caribou, and polar bears.
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Answer:
the engineering of rice crops to withstand flooding and contain more nutrients
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Overgrazing is a cause of desertification, so c.
