Answer:
A historian who compares the expansion of political systems to the expansion of economic systems to the expansion of economic systems is organizing history by THEME. Hope this helps.
Explanation:
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The Nile River
The Tigris and Euphrates Rivers
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Hello there!
Right answer is B) James K. Polk
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Answer:
some people being able to take up other things,
Explanation:
Surplus food leads to job specialization because not every one needs to be farming. this is leads to some people being able to take up other things, such as metal work. ... Surplus food also leads to civilizations because more people can survive, causing a population increase.