Answer:
Display rules
Step-by-step explanation:
In psychology, the term display rules refers to the informal norms in a group or culture that tell them how to express their emotions in an appropriate manner. This rules indicate when, where and how it is appropriate to display these emotions.
These rules are learned by people of that culture in their early lives and they vary from culture to culture.
In this example, Natalie is American and she is studying abroad in Taiwan and she sees a waitress drop a tray of drinks and then giggle which is odd to Natalie. In Taiwan they don't think mistakes are funny but they learn to react this way when there's a mistake done, this is something done in this culture and therefore, since this is an example of cross-cultural differences, this is an example of display rules.