What is the exposition to a dogs way home?

In "A Dog's Way Home," the exposition introduces Bella, a mixed-breed dog who is raised by a loving owner named Lucas. Set in Colorado, the story establishes Bella's deep bond with Lucas and her joyful life in the city. It also highlights the challenges she faces as a stray dog, setting the stage for her adventurous journey to reunite with Lucas after being separated. The exposition effectively sets the emotional tone and stakes for the narrative that follows.