Read this excerpt from "The All-American Slurp."

In China we never ate celery raw, or any other kind of vegetable raw. We always had to disinfect the vegetables in boiling water first. When we were presented with our first relish tray, the raw celery caught us unprepared.

What story element does the author develop in this excerpt?

conflict between family members
characterization of the Lin family
plot details about the Gleasons’ party
setting details about the Lins’ hometown