Final answer:
The dinner party at the Buchanan's in The Great Gatsby marks a turning point in the story.
Step-by-step explanation:
The dinner party at the Buchanan's in The Great Gatsby marks a turning point in the story. It is during this dinner party that tensions between the characters reach a climax and the major conflicts of the story are revealed and intensified. For example, at the dinner party, Tom Buchanan confronts his wife Daisy about her affair with Gatsby, which sets off a chain of events that lead to the tragic ending of the novel.