In the sentence, "In addition, a flame inside me rekindled my desire to draw," the phrase "a flame inside me" is used to evoke a strong, intense feeling or passion. The correct answer is C: "Flame" is used as a metaphor to compare kindling a fire to the writer's desire to draw again.
This metaphor suggests that the desire to draw was once diminished (like a dying fire), but has been reignited, indicating a resurgence of passion or inspiration for drawing.