What distinguishes Edith Wharton's writing style in her novels?

Edith Wharton's writing style is particularly characterized by her in-depth examination of moral struggles within high society. Her works often illuminate the complexities of social conventions, personal desires, and the ethical dilemmas faced by individuals navigating elite circles. Wharton intricately reveals the inner lives of her characters, showing how societal expectations shape their decisions and destinies.

For instance, in novels like "The Age of Innocence" and "The House of Mirth," she explores themes of love, ambition, and betrayal, all set against the backdrop of New York's upper class during the Gilded Age. This focus on the moral and ethical implications of social interactions distinguishes her work and offers profound commentary on the constraints of society.

The other options, while they might apply to different authors or contexts, do not capture the essence of Wharton's main thematic concerns and stylistic approach. Humor and satire, supernatural elements, and folk tales are not central to her literary focus; instead, it is the nuanced portrayal of social class and individual morality that defines her legacy as a writer.