They are "power breakers" they bring conflicting groups together. The encourage compromise- develop policies favorable to their interests or the groups that support them, organize and persuade voters to elect their candidates to office
Slaves in the North did primarily work in stores and small craft centers. This was mostly true for the middle colonies as well. Slaves in the South worked in the fields.
America's industrial revolution began to take root in A)new England, mostly because this is where lots of the water and supplies were. It never took place in the South.
It refers to the artists of the turn of the century, that is the art made at the beginning of the 20th century. It mostly refers to modernists and symbolism who created in this period and whose art was full of things like pessimism and cynicism. Modernity in general is associated with it.