The correct answer is - D: Fertile Farmland.
The civilizations in South Asia, as well as their major cities, were always located at places that had an abundance of fertile farmland. This usually meant that the major cities were established in close proximity to the large rivers, as their valleys had a lot of fertile farmland.
The main reason why the major cities in this part of the world were built in areas with lot of fertile farmland is because the economy was based on the agriculture. Another reason was the large populations on small areas. So basically, lot of food needed to be produced in order for this societies to be able to survive, and if possible to trade some food for other goods that they didn't had.
Explanation:
as posted in national geographic. Lincoln and other leaders realized amending the Constitution was the only way to officially end slavery. The 13th Amendment forever abolished slavery as an institution in all U.S. states and territories. In addition to banning slavery, the amendment outlawed the practice of involuntary servitude and peonage
The increased migration and increased population that the United States saw during (any) era are examples of "<span>c. demographic and environmental changes," since these have to do mainly with population distribution. </span>
i believe it is B) unalienable rights force the government to place no restrictions on liberty.