...help me out? Ok guys I'm having trouble with this question guys. I have to answer this question for my professor but i just cant find the answer. If you guys can answer this question it would be the biggest help. Please help guys. Thanks

Discuss the “new” immigration (the approximately 25 million immigrants from Europe, who came to the United States between 1865 and 1914):
Why did these immigrants leave their native countries? Why did they come to the United States? Discuss at least two reactions of the people already in the United States to these new immigrants, and why they had these reactions. Discuss at least three changes these immigrants brought to the cities of the United States where they came to live. What lasting effect did these new immigrants, and the fact of such a large number of immigrants coming, have on the United States?