The Zhou Dynasty declined due to a period of fighting in China
the Mandate of Heaven
a drought
geographical barriers

swahili is an extremely rich and complex civilization, a set of ethnic groups articulated by a language and a series of cultural elements that fuse the african traditions, islam and indian culture. this growth was largely a result of the indian ocean trading network that brought in not just man-made riches, but also religious ideas, specifically islam, which had a significant impact on the local culture. furthermore, the development of the swahili language gave a common cultural unity to the people.

answer; presidential election years;

answer; the residents of american samoa elect a nonvoting delegate to congress;