Final answer:
The scene with the families agreeing to end their feud is placed at the resolution of the plot diagram, where the story's conflicts are resolved.
Step-by-step explanation:
The scene in which the families agree to end their long-standing feud would be placed at the resolution of the plot diagram. The resolution is where all of the story's loose ends are tied up and the outcome of the plot is revealed. It comes after the climax, which is the peak of the action and the turning point, and the falling action, where the story begins to wind down following the climax.