Answer:
environment; resources would be the correct answer
The 11th amendment
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The answer is B. Ivan the great never called himself "The protector of Russia".
Industrialization in the north caused the civil war. The industrial revolution in the North, during the first few decades of the 19th century, brought about a machine age economy that relied on wage laborers, not slaves. I hope that this is the answer that you were looking for and it has helped you.