Final answer:
Crowds are characterized by being larger than cliques, often based on reputation or shared interests, and defined by the activities they engage in. They are not more personal than cliques as the relationships in crowds are usually less intimate.
Step-by-step explanation:
The features of crowds include several characteristics that distinguish them from other social groups such as cliques. When considering the options provided in the question, the following features of crowds can be outlined:
- Crowds are larger than cliques, which means they consist of a larger number of people who may not all interact directly with each other.
- Crowds tend to be based on reputation or a common goal, which might be a shared interest or a collective action, such as being fans of a sports team or participating in a protest.
- Many crowds are defined by activities they engage in. These activities could be casual, conventional, expressive, or acting, such as attending a concert, a religious service, or a political rally.
However, crowds are not more personal than cliques; in fact, cliques often involve more personal and intimate relationships within a smaller group setting. Therefore, option 'd' is incorrect.