What are economic opportunities that beckoned newcomers to the different regions of the US as a result of industrialization and urbanization?

The basic reason for most immigration to the United States
during the period of industrialization was economic opportunity.  Most immigrants who
came to the US did so at least in part for economic reasons.  The specifics differed
depending on the region and the ethnicity of the immigrants, but the basic idea was
generally the same.

Immigrants came to the East Coast and
to the Midwest from Europe.  Those who settled on the East Coast generally did so in
order to work in factories.  Those who moved on to the Midwest did so while working for
the railroad or in order to farm.  Chinese immigrants to the West Coast typically came
in order to work building the railroads.

In the majority of
cases, the real draw was economic opportunity.  Immigrants have typically been drawn to
the US in order to make a better living than they think they can attain at
home.