Foreshadowing and Chekhov's Gun
Foreshadowing is the practice of planting a detail, image, or piece of dialogue early in a story that will gain new meaning later. Chekhov's gun is the related principle: every significant element introduced must be paid off. Together, they create narrative economy and a sense of inevitability that makes readers feel the ending was earned rather than imposed. The technique works because the brain registers details it does not consciously process; when a foreshadowed element pays off, the reader feels a pleasure that is partly recognition. To foreshadow well, work backward from your ending: what seed needs to be planted in chapter two for the harvest in chapter twenty to feel true?