What structural change can an author make to create tension and suspense in a story?

One structural change an author can make to create tension and suspense in a story is to increase the frequency and intensity of conflicts. By introducing more obstacles and challenges for the characters to overcome, the story becomes more engaging and exciting for readers. This can be achieved by escalating the stakes, adding new threats or complications, and raising the emotional intensity. For instance, an author might introduce a ticking time bomb, a formidable villain, or a moral dilemma to heighten tension and keep readers on the edge of their seats.