Final answer:
Authors use allusion to reference well-known persons, places, or events, expecting readers to recognize them and grasp their relevance to the new context.
Step-by-step explanation:
Authors who use allusion assume that readers will recognize the original sources and understand how its meaning relates to the new context. Allusion is a literary device that references a person, place, thing, or event in the real world, often without explicit identification. These references are generally well-known to readers or audiences and are used to develop a story's characters, setting, or theme. Unlike an allegory, which presents a hidden moral or political meaning through a story, allusion simply makes a passing reference to something outside the narrative. It's assumed that the audience will understand the reference to add to their understanding of the subject being discussed or to lend a certain level of credence or authority to the work.