What is the most importand part in chapter 17 in bud not buddy?

Chapter 17 of "Bud, Not Buddy" is crucial as it marks Bud's reunion with his grandfather, whom he has been searching for throughout the story. This moment represents a turning point for Bud as he finally finds a sense of belonging and family connection that he has been seeking. It also reveals important details about Bud's family history and provides closure to his journey.