Given the task definition and input, reply with output. Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

In the Hollywood horror movie It(2017), which is based on a novel by Stephen King, the young girl Beverly who stays with her abusive father is shown as cutting her hair in front of mirror. Why does she do this? What is the significance of this scene? I want to know if I have missed out any other significant detail related to the scene.
Why Beverly cut her hair?