Final answer:
Suspense is often created through the use of foreshadowing, which provides hints about future plot developments, creating tension and anticipation for the audience.
Step-by-step explanation:
Suspense may be created via foreshadowing, a literary technique in which future events are hinted at, suggesting what will happen later in the story. An illustrative example of foreshadowing is found in the play Antigone, where Tiresias warns Creon that tragic events will befall his family unless he changes his actions. By doing so, tension is built, as the audience is aware that something significant will occur, creating a sense of anticipation and suspense.
In Ken Burns' documentary The Civil War, foreshadowing is used effectively to maintain audience engagement across its lengthy duration. The narrators provide hints that suggest a shift or significant event may soon take place, particularly following moments of intense emotion, contributing to the suspenseful atmosphere of the series.