Which of the following can be a direct consequence of bullying behavior?

A drop in academic performance is a direct consequence of bullying behavior because victims often experience emotional distress, which can hinder their ability to focus and participate in class. Bullying can lead to anxiety, depression, and a lack of motivation, all of which detract from a student's academic endeavors. When individuals feel unsafe or targeted in their school environment, they may become disengaged from their studies, resulting in lower grades and overall academic achievement.

In contrast to this, options suggesting improved peer relationships or heightened self-esteem reflect positive outcomes, which typically do not occur in environments where bullying is present. Increased school attendance can also be misleading, as instances of bullying might cause students to avoid school altogether. Thus, the negative impact of bullying on a student's learning experience is well-documented, aligning directly with the observed drop in academic performance among those affected.