The best way to interpret how the central conflict was resolved in the story is: "The central conflict is resolved effectively since the girls resolve their differences and make a decision to leave a note."
This response highlights the girls' ability to address their disagreement about the broken window and take responsibility for their actions, which is a pivotal moment in the story. The tornado adds an unexpected twist to the resolution, but the main conflict between Mariko and Felice is resolved through their final decision.