The correct answer is: America has struggled with its identity as a melting pot due to cultural differences and anti-immigration policies.
The fact America is described as a melting pot means that it gradually evolved from a highly, culturally diverse center to a more homogeneous society holding its own traditions.
During the evolving stage, american citizens conflicted with the arrival of immigrants laborally, socially, and religiously; immigrants were clearly not welcome, and subsequently, popular pressure pushed the congress to pass anti-immigrant policies - restricting the passage of many individuals. This idea is what the text intends to focus on, and it is achieved by presenting an introductory evidence as a means to provide the reader appropiate background knowledge to understand this purpose.
The primary goal was to kill his enemy.
4. With these facts in mind, Americans need to begin working on ways to improve the cleanliness of home areas for their cats.
5. Just as a human being must clean his dishes and his bathroom, a cat needs to have a bacteria-free food dish and litter box.
I'm not sure but I think it needs no comma. Hope this helped.