Final answer:
The shift to a tone of high-spirit and presence in "Araby" signifies the protagonist's growing optimism.
Step-by-step explanation:
The shift to a tone of high-spirit and presence in "Araby" signifies the protagonist's growing optimism. Throughout the story, the tone changes from one of disappointment and gloom to a more hopeful and enthusiastic tone. This shift reflects the protagonist's changing mindset as he becomes more hopeful and excited about the prospect of attending the bazaar.