Answer:
<h3>Chairman Mao Zedong launched the campaign to reconstruct the country from an agrarian economy into a communist society through the formation of people's communes. Mao decreed increased efforts to multiply grain yields and bring industry to the countryside.</h3>
Explanation:
Slavery in ancient Rome played an important role in society and the economy. Besides manual labor, slaves performed many domestic services, and might be employed at highly skilled jobs and professions. Accountants and physicians were often slaves. Slaves of Greek origin in particular might be highly educated.
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Slavery in ancient Rome - Wikipedia
Since early humans needed access to water & fertile grounds for agriculture, people settled near rivers. Rivers & mountains were used as barriers to provide natural borders
