Final answer:
Folkways are customs that vary across cultures, and they determine appropriate behaviors in different societies.
Step-by-step explanation:
The question is asking about customs that are considered acceptable in some cultures but not in others. These customs are known as folkways, which are norms without moral underpinnings that direct appropriate behavior in the day-to-day practices and expressions of a culture. Examples of such folkways include greetings, dress codes, and social interactions. For instance, in some cultures, it is acceptable to kiss on the cheek when greeting someone, while in other cultures, this may be seen as inappropriate.