what part do the "chaotic emotions of adolescence" (lines 17-18) play in motivating Lizbeth to taunt Miss Lottie?

The "chaotic emotions of adolescence" are completely responsible for Lizabeth's actions..... as well as her lack of self-control. Lizabeth destroys the flowers because she is angry and frustrated..... why should she allow another beauty, when she herself, is unable to find any.