Well, the whole novel is basically told through these letters, so they are used to advance the plot an offer some sense of authenticity to an implausible story. Plus, it is a way for them to express their own feelings and thoughts about the whole thing.
A poem by a Postmodernist might not rhyme, and it might employ unconventional grammar and spelling. A poem by a Classicist, however, will follow an established format and be modeled after ancient Greek and Roman poetry.
Naturalized citizen: immigrants who obtain citizenship in their new country
Household: people who live together in a single residence
Kinship Ties: Social relationships, particularly among people who are related by family connection
Clan: A large group of people united by kinship ties
