Final answer:
Dialogue in literature serves multiple purposes such as showing character personalities, moving the plot forward, revealing backstory, and making the text engaging and realistic.
Step-by-step explanation:
Dialogue serves multiple functions in literature. One of the main purposes of using dialogue is to show the personalities of the characters and move the plot forward. By using dialogue, authors can reveal the relationships between characters and their individual traits. Dialogue can also provide insight into the backstory of the characters and the events that occurred before the story began. Additionally, dialogue can make the text more engaging and realistic for readers.