The ending of "Dusk" by H.H. Munro (Saki) creates a significant effect of c. surprise for the reader.
In the story, the protagonist, a young man, engages in conversation with a woman, and the narrative builds tension as he reveals his disdain for societal norms and expectations. The surprise comes at the conclusion when the reader learns the true nature of the young man’s intentions and identity, which adds a twist to the previously established tone and character dynamics. This unexpected revelation shifts the reader's understanding of the events leading up to the end, making it a shocking and memorable conclusion.
While there are elements of tension and mystery throughout the story, the final twist elevates the surprise factor, making it the most prominent effect for the reader.