Final answer:
The teen is missing the character trait of empathy.
Step-by-step explanation:
The character trait that this teen is missing is empathy. Empathy is the ability to understand and share the feelings of others. In this situation, the teen failed to consider how her actions would affect the three girls whose lockers she vandalized. Instead, she viewed it as a funny practical joke, showing a lack of empathy for the freshmen girls.
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