What is the role of exposition in a narrative?

The correct choice highlights the essential function of exposition in a narrative, which primarily involves introducing background information and characters. Exposition sets the stage for the story by providing the necessary context that helps readers understand the setting, the main characters, and the circumstances that lead to the unfolding of the plot. This information is crucial for establishing the tone and mood of the narrative and for giving readers a foundation upon which the subsequent events, conflicts, and character developments rest. Without effective exposition, readers may struggle to grasp the significance of the story's events as they develop.

The other options address different narrative components: the climax refers to the turning point in the story, while resolution pertains to how conflicts are settled. Presenting themes is a broader aspect of storytelling that emerges later as the plot progresses. This distinction underscores why the introduction of background and characters is the focal point of exposition.