Final answer:
David Yoo's 'Heartbeat' explores themes of identity, family dynamics, and pursuing one's passion.
Step-by-step explanation:
David Yoo's novel 'Heartbeat' explores multiple themes throughout the story. One theme that develops is the idea of identity and self-discovery. The protagonist, a Korean-American teenager named Peter, grapples with his Korean heritage and his American upbringing, which contributes to his journey of understanding his own identity.
Another theme is the exploration of family dynamics and relationships. Peter's interactions with his parents, grandparents, and sister highlight the complexities and challenges within a family.
The theme of following one's passion and pursuing one's dreams is also prevalent in the novel. Peter's love for playing the drums and his determination to pursue music despite the expectations of his parents showcase the importance of pursuing one's passions.