What does Aristotle define as essential for a plot's wholeness?

Aristotle emphasizes the concept of "unity of action" as essential for a plot's wholeness in his discussions on dramatic structure, particularly in his work "Poetics." This principle underscores the importance of a coherent and focused narrative where all parts of the story contribute directly to the central action and theme. For a plot to achieve unity of action, every event and character's decision within the narrative must serve a purpose that aligns with the overall trajectory of the story. By focusing on unity of action, Aristotle argues that plots should have a beginning, middle, and end that are logically connected, allowing the audience to follow the plot's developments and emotional arcs seamlessly. This cohesiveness is vital to evoke a sense of fulfillment and resolution in the audience, thus ensuring the plot is impactful and meaningful.

In contrast, while character relatability, originality of theme, and vivid imagery can enhance a story, they do not specifically address the structural integrity and interconnectedness required for a plot to be considered whole. Without unity of action, a plot risks becoming disjointed or confusing, ultimately diminishing its effectiveness.