1.Quick Answer
People immigrated to America for a different of reasons, mostly because they were seeking personal, religious or economic freedom. The biggest reason for immigration, was poverty. People left their home countries, where they had low wages and poor living conditions, to go to America and attempt to create a better life for them and their families.
2. Asia, Southern Europe, and Eastern Europe
3.chinese were discriminated against as immigrant because they were thought of as thieves.
4.ummm....anything they could find. especially factory jobs
5.Cities in the 1800's that absorbed immagrants often had deep division between the upper and the lower class.