Final answer:
The word 'listlessly' signifies performing with a lack of energy or enthusiasm. Jing-mei's listless performance during her mother's tests indicates her disinterest or resignation, a sentiment often depicted in characters who are emotionally or physically exhausted.
Step-by-step explanation:
The word listlessly, as used in the given selection, defines a manner of conducting oneself with a lack of energy or enthusiasm. When Jing-mei performs listlessly during her mother's tests, it means that she is doing so with little interest or spirit, likely indicating her unwillingness or resignation towards the situation. This is apparent in how she props her head on one arm, suggesting a lack of motivation to actively participate or to try her best.
Examples from literature where characters exhibit a similar lack of energy or enthusiasm can help further illustrate the meaning of listlessly. Characters in these scenarios often show signs of emotional or physical exhaustion, expressing their experiences with heavy eyes, a sense of apathy, or a weariness that affects their actions—mirroring Jing-mei's listless performance.