Here's why:
* Dialogue reveals personality: The way characters speak to each other, their tone, word choice, and even silences, can reveal a lot about their personalities, motivations, and relationships.
* Dialogue creates conflict: Interactions can spark arguments, create misunderstandings, or build tension, driving the plot forward.
* Dialogue shows relationships: How characters treat each other, the level of respect or affection, and their power dynamics are often revealed through their conversations.
While other methods of characterization like actions, appearance, and thoughts are important, dialogue provides a dynamic and immediate window into the characters' personalities and their interactions with each other.