Final answer:
Trina is exhibiting symptoms of mania, a phase of bipolar disorder, characterized by high energy, less need for sleep, and increased sociability.
Step-by-step explanation:
The symptom of bipolar disorder Trina is experiencing is often referred to as mania. Mania is characterized by an excited mood, a high level of energy, increased socialization, and a flurry of activity with projects or goals, often with little need for sleep.
Despite a lack of sleep, individuals like Trina may still report feeling great, which can be a misleading measure of well-being for those unfamiliar with the signs of bipolar disorder.
Specifically, Trina's reduced need for sleep, her increased sociability, her new ideas and projects for her house, as well as the fact that she has actually initiated several are classic indicators of a manic episode.
Given the impact on concentration, memory, academic performance, and overall quality of life, it's important that such symptoms are recognized and addressed in students to support their health and educational success.