The climax of the novel is Danny's father, Reb Saunders, forbid Reuven and Danny to continue their friendship after Reb found out that David was going to make a homeland for the Jews in Palestine.
I want you far away from my son!
The falling action is Danny's father telling Danny that he knew about Danny's decision of not becoming a Rabbi. Reb Saunders also mentions that the silent treatment was a way of teaching Danny about compasion.
The Chosen ends with Danny visiting Reuven to say goodbye. The resolution of The Chosen is Danny cutting off his beard and earlocks, this was symbolic of Danny solving his problem of having to become a Rabbi against his will. Danny moving to Columbia was okay with his father, Reb decided to respect Danny's decision.