What type of crowd is known for its intense feelings of celebration or revelry?

An expressive mob is characterized by its intense feelings of celebration or revelry. This type of crowd typically forms during events such as parades, concerts, or festivals, where individuals come together to openly express their emotions, joy, and communal spirit. The atmosphere is often charged with positive energy, and the behaviors exhibited by participants include cheering, dancing, and collectively celebrating a shared experience.

In contrast, other crowd types represent different motivations and behaviors. For instance, a flash mob is known for its planned and sudden gatherings, often focused on performing a choreographed act and dispersing quickly. An aggressive mob is usually marked by hostility and potential violence, arising out of anger or frustration, while an acquisitive mob is driven by a desire to obtain goods or resources, often resulting in looting or theft. Therefore, the defining feature of the expressive mob is its focus on celebration, making it the correct answer to the question.