Final answer:
The sentence from 'Homesick' that wouldn't need alteration when converting to third-person narration is, 'As soon as we were on the dock, we were jostled from line to line.'
Step-by-step explanation:
The excerpt from Homesick that would remain unchanged if the story were narrated from a third-person point of view is: "As soon as we were on the dock, we were jostled from line to line." This sentence doesn't contain any first-person pronouns that would need to be changed when switching from first-person to third-person perspective. The excerpt is focused on what is happening to the group rather than to an individual, which makes it compatible with a third-person narration.