Final answer:
Marcus from the narrative text exhibits a variety of complex behaviors ranging from sarcasm, humor, friendship, to violence and unease. His character is marked by mood swings and a tumultuous relationship with McTeague, complicated by a mutual love interest. His wrongdoing seems to arise from his temper, jealousy, and violent actions.
Step-by-step explanation:
The student's question relates to the character Marcus from a narrative text, likely from a novel or short story. From the provided passages, we can surmise that Marcus is portrayed as a complex character with shifting emotions and reactions. At times, he appears sarcastic and out of temper, whereas at other moments, he is described as a josher who lightens the mood with his humor.
Marcus's sense of wrong and unease in McTeague's presence suggests a deeper underlying conflict between the characters, likely due to both being in love with the same girl. Marcus's actions fluctuate between homely, such as when he passes the billiards ball to McTeague or welcomes him, to hostile, where he exhibits violent tendencies, like throwing his knife in a "greaser" style, indicative of a deep-seated anger or frustration.
Throughout the excerpts, it's clear that Marcus grapples with emotions and actions that can be perceived as 'wrong' in the eyes of the reader or other characters. His relationship with McTeague is riddled with complications, where a mix of friendship and rivalry comes to the forefront. Marcus's conflicting behaviors create a sense of tension and unpredictability in the narrative.
Factors like jealousy, betrayal, and masculine pride seem to fuel his temperament, leading to his erratic behavior and mood swings. However, the exact nature of his wrongdoing is not explicitly stated but implied through his volatile character traits and the uneasiness they provoke in others.