Answer: new immigrants had difficulty adjusting to life here. At the same time, the United States had difficulty absorbing the immigrants. Most of the immigrants chose to settle in American cities, where jobs were located. As a result, the cities became ever more crowded.
Answer: They think their on top of the world and they also think they can dominate any other race so i would say domination.
The sun in the golden cat basically symbolizes the attitude of the poem. It is a happy poem, in contrast the cat and the moon is more gloomy. Hope this helps! Also are you a k12 student?
I don’t think you need a comma after old