Between 1880 and 1920, the number of industrial workers started from 2.5 million to:

It changed from 2.5 million workers to 10 million workers.
A number of workers came from all over the world. Since the development of industrial technology opened up a lot of opportunities, many people all over the world start to migrate into united states to get jobs. This cause the massive increase in industrial workers that we see during the period.

Towns and small farms are usually for land, lakes, rivers, and seas.they also produce other food, like crops.it's also where animals are, where we get our meat.large plantations normally have forests, where crops are grown for sale. (similar to farms)plantations have larger fields of crops.our wine, sugar canes, and fruits come from plantations.