The third chapter  (di che cosa) develops aspects of Eilis's (chi è)  life already anticipated in the second chapter as (like) : her work at Bartocci's, her  boardinghouse life, her evening lessons and her love story with Tony.

This chapter put first Brooklyn's settings and focus also Elis's American life, tanking into consideration the environment aspects.
In this pages the novelist mainly analyzes the protagonist's reaction to the news of her sister's death.
Right from the start the intelligent reader can notice that, it's a third person omniscient narrator who is talking and he talks from Eilis's point of view so that the reader understands how she felt in that situation but also from Miss Fortini, Mrs Kehoe and Father Flood one. In this case there is a shift of point of view and, later, also a shift from telling to showing which has the purpose to communicate to the reader the same excitement of the character. Tanks to the adverbs that the novelist introduce into telling parts you can be aware of the value judgment of whose writing, for example: " hesitantly", "clearly" etc.
By the words of Eilis's mother and Father Flood it's easy to understand the relevance that religion absorb in the life of that time for a lot of people and you can notice it by the repetition of the word "heaven". Over that it seems that nobody, neither Tony, are there to give Eilis a tangible help and consolation as the intelligent reader can notice when the protagonist return to her boardinghouse and all of them prefer to talk about the changes in Brooklyn instead to ask her how she feels like.
The reader is a witness in Eilis's interior monologue when she picked up the letters that Rose wrote her and think and praise Rose for her "self-possession and self-confidence". Once again you are able to notice the influence that her sister, even if she's death, exercise on Eilis's life.