Final answer:
In Aeschylus' 'Prometheus Bound', the literary device of foreshadowing is prominently used, giving hints about future events and creating suspense.
Step-by-step explanation:
The literary device found throughout Aeschylus' Prometheus Bound is foreshadowing. Foreshadowing is when the author gives hints about the plot developments to come before they actually happen. For example, in another of Aeschylus' works, the audience is given a hint of Orestes' identity through reasoning in the Choephori, similar to how in Prometheus Bound, there are instances where the future punishments of Prometheus are hinted at, indicating future events that unfold later in the play. This creates suspense and engagement for the audience, as they anticipate the developments that have been subtly suggested.