I need help with the central idea and the box at the bottom?

How did the instition of slavery continue to affect the world even after it was abolished?

Averb diagram that shows the similarities and differences of two african kingdoms

How did the technology of the late 1800s affect the growth of cities? select one: a. cities were able to expand outward because of additions to railroads. b. electric streetcars enabled the wealthy city dwellers to move to the first suburbs. c. advances in steel and metal technology allowed for the development of the skyscraper, which allowed cities to grow upwards. d. all of these are correct.