Which of the following is an example of a cultural identity that is considered "fixed"?

Race is often viewed as a fixed cultural identity because it is typically defined by physical characteristics that are inherited and cannot be changed. These characteristics, such as skin color, facial features, and hair texture, are associated with certain racial groups and are seen as permanent aspects of individuals' identities. While the social implications and perceptions of race can change over time due to cultural and societal shifts, the underlying biological components that define race remain unchanged.

In contrast, other options such as class, occupation, and regional identity are more fluid and influenced by a variety of factors including social mobility, educational opportunities, and life experiences. Class can change based on economic circumstances, occupation can vary widely throughout a person's life, and regional identity can shift depending on where a person moves or how their community evolves. This fluidity highlights the distinction between race as a fixed identity and the other cultural identities that can be more dynamic.