Answer:
Menelik II fought off Italians bent on taking his empire, but also oppressed and enslaved ethnic
Explanation:
The answer you are looking for is the last one! It should be "It encouraged workers to create goods more quickly and efficiently."
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The map that is given gives you a hint to what the answer is. On the legend it states the hint, "people per km²". This tells us that the map shows the population density in South America. A population density map shows which areas have the most people to least people.
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Native Americans most likely built mounds for ceremonial and/or burial purposes. I know this because I am Native American. Good Luck! Hoped this helped.