When did trade centers begin to appear in eastern africa?

Examine extracts from the bible which demonstrate the principal beliefs of christianity

In a study, people were asked to imagine simple occasions that made them happy and to remember events that made them feel proud about themselves. it was observed that the subjects developed an increasingly positive attitude. these changes are known to be healthy, leading to greater physical activity and reducing unhealthy habits. based on this excerpt, we can conclude that a positive attitude .

What did george washington say about national unity in his farewell address and why did he feel that way?