Which is a characteristic of popular culture?

1. quick to change its commonalities..
2. defined by region or location.
3. practiced by a homogeneous group of people.
4. defined by existing within the dominant culture.

1. Quick to change its commonalities: This is a characteristic of popular culture. Popular culture is often responsive to trends and changes rapidly with the times as new ideas, styles, and interests emerge. Certain aspects of pop culture can become viral and widespread quickly, often changing or evolving as they spread.

2. Defined by region or location: While some aspects of popular culture can be regional, in the age of globalization and the internet, pop culture tends to transcend geographic boundaries. It's more likely to be influenced by mass media and shared across various locations, making this a less defining characteristic of popular culture.

3. Practiced by a homogeneous group of people: Popular culture is typically not confined to homogeneous groups of people. Instead, it spreads across diverse groups and is characterized by its broad appeal to various demographics. Popular culture often brings together people from different backgrounds.

4. Defined by existing within the dominant culture: This statement is somewhat true. Popular culture often arises from and is disseminated through the dominant culture. It includes mainstream trends and norms that are widely accepted and consumed by a significant portion of the population. However, popular culture can also include elements from subcultures or countercultures that gain widespread acceptance.

In summary, the most defining characteristic of popular culture among these options is its tendency to change rapidly, reflecting the dynamic nature of societal interests and media consumption.