One object is a block of wood
Castles were often built at crossroads to guard important or strategic sites.
D)Blacks should launch legal and scholarly attacks on segregation without hesitation.
As Du bois was a fimr believer in education and self improvement, searching for growth thru economic and academic succes he was also convinced that they had to get rid of sergregation first, cause if the head of your country tolerates segregation that gives a reason to all white man to believe and treat black men as inferior to them.
Well one main and obvious reason would be there wouldn't be enough resources for everyone to use. Another one would probably be air and water pollution would increase immensely. And the last one would be a lot more crimes and political issues? I'm not sure if the last one is valid but the first 2 are definitely counted. <span />