I don't know what the "followings" are, but I can tell you that Tenement buildings had no interest in caring for the people who lived there. Tenement housing had its people share bathrooms, there were no lights(besides the window), and the rooms were small and cramped.
They are called entrepreneurs
I believe it is workers had more negotiating power when standing together as a group rather than they had individually," since it would be very detrimental to a company if their entire workforce quit at once.
More young people traveled to the city to get jobs.
