Answer:
The narrator uses the pronoun "we" in place "I" because he is narrating the story from a first-person point of view and is providing a moment in which a group, to which he belongs, is doing something.
Step-by-step explanation:
The narration with the first person point of view occurs when the narrator is part of the story, as a character, and is telling the events that happened in his life. This type of narration is easy to identify by the constant use of the pronoun "I," when the narrator is telling something done by himself, and by the use of the pronoun "we" when he is telling about something done by a group to which he is part of.