Final answer:
Tom's revealed knowledge of Miss Watson's will adds to the theme of moral ambiguity in Huck Finn.
Step-by-step explanation:
The revelation of Tom's knowledge of Miss Watson's will in the chapter of Huck Finn contributes to the theme of moral ambiguity. It highlights the complex nature of morality and raises questions about the right and wrong actions. Tom's decision to withhold the information about Jim's freedom, despite knowing that it was against Miss Watson's wishes, demonstrates the ethical dilemmas characters face in the novel.