A. A united action
In sociology, a collective behavior is a relatively spontaneous and temporary behavior that is done by a large number of people doing activities that deviate from the norms. These are behaviors that violate social expectations. In short, these are behaviors that are usually avoided. Collectivity is the term sociologist use to define people who engage in collective behavior. The behavior is spontaneous, unstructured and temporary and people involved think that they belong to an identifiable social unit like a political party.