Final answer:
The statement most likely refers to a deepening relationship between Nick and Judy in the context of a literature piece that explores themes of love and commitment.
Step-by-step explanation:
By the end of the chapter, Nick and Judy's relationship has deepened is the likely completion of this sentence, as it fits the context of English Literature and narrative development.
From the excerpts provided, it is evident that relationships between characters evolve over time either deepening through affection and understanding or faltering due to external pressures and individual growth. The storylines suggest themes of love, commitment, and personal transformation.
In the given text, the relationship between Nick and Jane has deepened by the end of the chapter. We can see that they have a strong emotional connection and affection for each other. The text mentions Jane's resignation and the boy's transformation into a man, which contributes to the development of their relationship.