The similarity between the feudal manors of Europe and traditional villages of India is that the ability of a peasant to change the social status. Because of this, there is no social mobility to the both of them.
I think its D: The Red Sea
The Songhai Empire controlled the production and supply of Salt. This was a very important commodity which was known as white gold at the time.
At its peak the Songhai Empire was the largest and richest Empire in Africa and one of the most powerful in all of the Muslim world.
The cities of Timbuktu and Djenné became importing trading centers and remained one of the most important cities in Africa until the empire's demise.
Apart from salt, the empire grew rich due to its control over vast supplies of Gold, slaves, kola nuts, leather, and dates.
Eventually, the huge riches of the Empire attracted attention from other leaders of the region. In the last 20 years, the kings of Songhai were in constant feud with multinational armies which took a political and economic toll on the Empire.
Answer: The Freedmen’s Bureau provided food, housing and medical aid, established schools and offered legal assistance. It also attempted to settle former slaves on land confiscated or abandoned during the war.
In both forms, powerful countries dominated weaker ones for economic gains.
