How do authors use foils in literature?

Authors use foils in literature primarily to contrast characters, which effectively highlights specific traits of both the protagonist and the foil. By presenting two characters with opposing qualities or motivations, an author can draw attention to particular characteristics that might otherwise go unnoticed. This contrast allows readers to gain a deeper understanding of the main character’s qualities, decisions, and motivations.

For instance, a brave character might be paired with a timid one; the bravery of one will be more pronounced by the fearfulness of the other. This technique serves not just to embellish character development but also to enrich the overall narrative, making the interactions and conflicts more engaging and meaningful.

The other choices do touch on various literary techniques but do not accurately capture the primary purpose and function of a foil in character dynamics within a narrative.