Answer:
This question lacks context but I will try to answer with what I can. When a poem juxtaposes, it places two different things side by side so you can compare and contrast, giving the poem an interesting effect. The poem might be suggesting that there are many similarities in the two subjects being juxtaposed as well as differences.
The first sentence of your answers
Answer:
Search the meaning of the words and determine which one doesn't belong by the meaning. Hope this helps! :)
The Gateway Arch- Common Noun
St. Louis, Missouri- Proper Noun
Hope this helps :)
