The main reason why the South was so upset by Lincoln’s election in 1860 is because he had made it clear that he was opposed to slavery, which was the primary driving force of the South's economy.
La respuesta es la b incas
Among benefits of the ethnic, language and religious diversity in Africa one may single out the ability to learn from the different ethnic groups and build interconnections between them, thus establishing a successful, well-functioning multicultural society.
Speaking about pitfalls, when one deals with such a great cultural diversity, there is always a possibility of disagreement on the cultural ground, which may in the worst case even lead to murder, for instance, when there is a collision of religious viewpoints.
With rivers, cities grew with receiving enough resources from the rivers like water and fish for survival. With rivers, they can ride to different cities and trade. Rivers are a very important part of nature. They can give you so many resources for survival.
B- structure, hope this helps : )