Answer:
One possible thesis that addresses the question of how the author uses flashbacks and self-reflections to reveal aspects of the character's identity in "The Winter Hibiscus" could be:
"Through the use of vivid flashbacks and introspective self-reflections, the author of 'The Winter Hibiscus' effectively reveals the multifaceted and complex identity of the protagonist, illuminating the struggles and triumphs that have shaped her into the person she is today."