Final answer:
The theme is one of loss and unrealized potential, influenced by poverty, lack of support, and societal challenges, as reflected in the struggle for identity and acceptance.
Step-by-step explanation:
The theme being expressed in the student's question is the sense of loss and unrealized potential due to the circumstances of poverty, lack of familial support, and societal challenges. The passage reflects on the struggles of a child who grows up in a difficult environment, touching upon themes of neglect, internalized pain, the effects of socio-economic status, and the pursuit of identity in an unwelcoming world. This aligns with the larger thematic concern present in the various literary excerpts provided, where characters face social exclusion, emotional hardship, cultural identity crises, and the arduous path of self-discovery against numerous obstacles.