Final answer:
The sub plot of Corinthians serves to explore themes of identity and self-discovery, provide a contrast to the central plot, and add depth to the overall narrative of the novel.
Step-by-step explanation:
The sub plot involving Corinthians in Song of Solomon serves several purposes within the novel. Firstly, it allows Morrison to explore the theme of identity and self-discovery. Corinthians herself goes through a journey of self-discovery, trying to break free from societal expectations and find her own path.
Secondly, Corinthians' storyline provides a contrast to the central plot of Milkman and his quest for ancestral identity. While Milkman is focused on his own family history, Corinthians represents a different perspective, highlighting the experiences of Black women and the challenges they face in a patriarchal society.
Furthermore, Corinthians' sub plot also contributes to the overall structure and narrative of the novel. It adds depth and complexity to the story, allowing the reader to see different facets of the African-American experience and the different ways in which characters navigate their identities.