Answer:
Native Americans had never been exposed to those diseases.
Explanation:
To become an ally. To import amd export goods to eachother amd better eachothers economies.
The purpose of the counter-reformation was to fight against reformation which was turning more and more people against the Catholic church. The council of Trent was called to host sessions and debate on how the Catholic church should respond to reformation. The Jesuits were important because they started organizing missions worldwide in order to teach people about Catholicism and the pope and Christianity and similar things and were successful at it. The outcomes of the council were a series of declarations on how the church should behave.
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.
Steam boats would fall apart if it hit a rock or snag
