Oskar is depicted as meticulous in his actions and behavior.
In this excerpt, Oskar's narration highlights his meticulous nature as he finds solace in touching his deceased father's belongings and straightening hangers. These actions depict him as a detail-oriented individual, emphasizing his meticulousness. Therefore, His straightening of the hangers makes him seem meticulous is the most fitting option as it aligns with Oskar's character portrayal.
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