Introduction:
The conclusion or ending of a story is a crucial element that serves a specific purpose in the overall narrative. It provides the reader with a sense of closure and completes the story in a meaningful way. This answer will explain why the purpose of a story's conclusion is to leave the reader with a sense of closure.

Explanation:
The conclusion of a story is the final part where loose ends are tied up, conflicts are resolved, and the main events reach a resolution. It brings the story to a satisfying end and provides a sense of completion for the reader. Here's a detailed explanation of why the conclusion serves the purpose of closure:

1. Resolving conflicts:
The conclusion of a story often involves resolving the conflicts or problems that the characters have faced throughout the narrative. It brings the story to a point where the main conflict is resolved, and the characters' goals or desires are achieved or denied. This resolution provides closure to the reader as they see the outcomes of the characters' journeys.

2. Tying up loose ends:
Throughout the story, there may be various subplots, unanswered questions, or unresolved issues that need to be addressed. The conclusion of the story ensures that these loose ends are tied up, providing closure to the reader. It gives them a sense of satisfaction by providing answers and resolving any lingering uncertainties.

3. Emotional resolution:
The conclusion of a story often involves an emotional resolution for the characters. It allows them to grow, learn, or change in some way, leading to a sense of closure for their personal journeys. The reader can empathize with the characters' emotional development and find closure in seeing them find peace or closure themselves.

4. Reflecting on themes:
The conclusion of a story also allows the reader to reflect on the themes or messages conveyed throughout the narrative. It provides an opportunity to consider the deeper meaning or lessons learned from the story. This reflection reinforces the sense of closure by providing a broader understanding of the story's purpose.

5. Leaving a lasting impact:
A well-crafted conclusion has the power to leave a lasting impact on the reader. It can evoke emotions, provoke thoughts, or resonate with the reader even after they finish reading the story. This impact further enhances the sense of closure by leaving a memorable impression.

Conclusion:
In conclusion, the purpose of a story's conclusion or ending is to leave the reader with a sense of closure. It achieves this by resolving conflicts, tying up loose ends, providing emotional resolution, reflecting on themes, and leaving a lasting impact. The conclusion brings the story to a satisfying end, ensuring that the reader feels a sense of completion and fulfillment.

The purpose of a story's conclusion or ending is to leave the reader with a sense of closure, wrapping up the story's plot and resolving key elements.