6. Most immigrants could only afford to travel to the United States in which 1 point of the following?
Automobiles
Railroad cars
Steerage
O
First-class plane seats

Ifound this on google “the existence of agglomeration economies is central to the explanation of how cities increase in size and population, which places the phenomenon on a larger scale. the concentration of economic activity in cities is one reason for their development and growth.” i hope this you for what your looking for.