Answer:
Is that internal validity refers to the structure of a study and it's variables while external validity relates to how universal the results are.
Explanation:
C) specialization of labor
Answer: d. Wealth changed the amount of power held by ancient civilizations.
Explanation:
Ancient civilisations were able to spread their power and influence more when they had wealth. Wealth enabled them to fund larger armies and trade more of their goods which brought power to them.
With the larger armies they were able to maintain from being wealthy, ancient civilizations like the Babylonians were able to conquer and subjugate neighbouring areas thereby giving them more power over more areas thus enabling them to establish great empires.
The Atlantic connected colonial America to the old world.
Without the ocean nearby, colonists would have been cut off from many goods like tea, steel, and manufactured products.
This usually kept early colonists close to the shores of the Atlantic.