Plz help! I just need help with the question of why the author wants us to know this. Identify three details that tell you how similar or alike they are. Why do you think the author wants us to know this?)

Antonio Cruz and Felix Vargas were both seventeen years old. They were so together in friendship that they felt themselves to be brothers. They had known each other since childhood, growing up on the Lower East Side of Manhattan in the same tenement building on Fifth Street between Avenue A and Avenue B. Antonio was fair, lean, and lanky, while Felix was dark, short, and husky. Antonio’s hair was always falling over his eyes, while Felix wore his black hair in a natural Afro style.

Each youngster had a dream of someday becoming lightweight champion of the world. Every chance they had, the boys worked out, sometimes at the Boys’ Club on 10th Street and Avenue A and sometimes at the pro’s gym on 14th Street. Early morning sunrises would find them running along the East River Drive, wrapped in sweatshirts, short towels around their necks, and handkerchiefs Apache-style around their foreheads.