How can dialogue best help to develop a character? choose one

Dialogue can reveal a character's personality.

By the way a character speaks, the words they choose, their tone, and their mannerisms, dialogue provides insight into their background, beliefs, emotions, and motivations. For instance, a character’s choice of informal language or slang may indicate they are youthful or laid-back, while a more formal vocabulary can suggest education or a serious nature. Additionally, the way characters interact with each other through dialogue can reveal their attitudes, relationships, and social dynamics. Thus, dialogue serves as a powerful tool for portraying internal conflicts, desires, and the nuances that make a character distinct and relatable to the audience.