Naturalized citizens are mostly more politically involved and tend to participate in things like voting more. Naturalization has a positive effect on voter turnout. Naturalized citizens are often immigrants from areas where their rights are not respected so they move to other places where they are willing to participate in public affairs because the system suits them better.
It could represent infinity because the ocean looks infinitely long. also, the sky is blue during the day, so blue could also represent infinity that way.
Describing the struggles of the urban poor.