What "line" divides the northern and southern US states?

More Questions from World Geography

• In what country would you find Coptic Christians?
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• What building is famously located at 1600 Pennsylvania Ave?
• What type of bridge was used to bring water to Roman cities?
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• What was the former name of Ho Chi Minh city?
• In what US state does the Mississippi River begin?
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• What is the world's first national park?

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