I think the main factor was the lack of safety workers had during the Industrial Revolution, especially women, children, and minorities. Some of the results were an increased concern and awareness of factory conditions, labor reforms, and a larger role for the government to monitor companies' treatment of workers.
The answer to that is the Sahara desert.
A decrease in the cost of automobiles.
Answer:
1- Jews could not move out of the ghetto,
2- Jews were permitted to move out of the ghettos
