Answer:
It reveals character personality details.
Step-by-step explanation:
Dialogue is a feature of a literary text that involves a conversation between two or more characters. It can also be termed as an exchange of words between two or more people.
Dialogue is an integral part of a story because it helps readers to get to know the character(s). The dialogues spoken or used by people are a means to give them personality and are a much better character development instead of the narrator or speaker describing them.
Thus, the correct answer is the first option.