One of the major factors that allowed Native Americans in Mexico to settle cities larger than those in areas to the north was better soil, which led to better crops being harvested, which led to larger populations being sustained.
Answer:
Xuanzong
Explanation:
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Yes I think the answer is B concrete.
It is important because it lessens, minimize, or reduce competition in the western part of the country, they can determine accurately the time zone of one town from another town – for example, one town might have 6 am whenever the sun rises and another town had 6 am 10 minutes later, they made it possible for towns to lay their own tracks and most importantly; they provide greater efficiency in production, safety, and scheduling.