Why would an influx of immigrants to the United States lead to industrialization and urbanization of major cities all across the country?

Due to diminishing natural resources, unemployment and poverty, drought and economic depression forced many immigrants from different countries to move to US during the industrialization.

Explanation:

During the second industrial revolution, many immigrants moved to Us from Asian countries specially China in order to settle in America for a better standard of living. Transcontinental Rail road companies offered huge employment opportunities which attracted even the people pf other countries to immigrate to US. Immigrants from France and Spain also settled in America and they were employed in various industries. Immigrants found a better way to live in America.

Initially they felt it to be difficult but the enormous natural resources and flourishing job opportunities made the immigrants to settle in America which resulted inn many factories to be established. Asians were found to be the labor source which accepted for cheaper cost. So It was a Win-win situation of American economic growth and immigrants contribution to it.