A student consistently shares notes, defends classmates from bullying, and mediates disputes in the school. This student is BEST described as demonstrating

Prosocial behaviour refers to voluntary actions intended to benefit others, such as sharing, defending, and mediating, all of which strengthen interpersonal bonds and community well-being. Authoritarian leadership involves control rather than cooperation. Antisocial behaviour harms others, and passive aggression involves indirect hostility, none of which describe the student's actions.