Final answer:
The exposition in 'One Voice' by Melissa de la Cruz is the part of the story that introduces the setting, main characters, and themes. It prepares the reader for the journey ahead.
Step-by-step explanation:
Exposition: This is the part of the story that tells us the setting. We find out who the main characters are and where the story takes place. The exposition also hints at the themes and conflicts that will develop later in the story. Exposition can take place throughout a story as characters reveal more about themselves.