Answer:
B.any mechanical force that tends to slow or oppose
motion
Explanation:
hope that helped
 
        
             
        
        
        
Answer:
C)
spread of disease pathogens among urban populations
Explanation:
 
        
                    
             
        
        
        
It is very much hard to answer. 
It was mainly because of how the North and the South of America had different lifestyles and economy's. You would be surprised to know that the Democratic party back then supported Slavery and the republicans dint support Slavery. 
Plain Answer: Because of Slavery, Way of Life and Different Economy. The Democratic Party would do anything to keep themselves supported. 
 
        
             
        
        
        
ZIMBABWE CONTROLLED TRADE ROUTES THAT FLOWED TO THE EAST AFRICAN COAST