How do immigrants really affect the u. s. economy?

I literally just did a whole essay on this for my class, When working immigrants come into the United States they provide low cost labor, allowing companies to offer their products at a lower cost for everyone else, and immigrants also pay taxes when buying goods, helping cover medicare and other funds taxes go into, but they do create competition in work areas with natives without a college education, such as agriculture and construction, since higher paying jobs require education and strong communication skills.

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.