What is the external conflict in book bully by Paul Langan?

In "Bully" by Paul Langan, the external conflict revolves around the protagonist, Alex, who is facing relentless bullying at school. Alex is targeted by a group of older students, led by the main bully named Bradley. The bullying manifests in various forms, including verbal abuse, threats, physical violence, and social exclusion. Alex's external conflict is to navigate this hostile environment and find ways to protect himself from the ongoing bullying.