Answer:
informal groups
Formal groups tend to have a larger life span than informal groups due to the following reasons:
Structure and Organization: Formal groups typically have a clear structure and established rules and procedures that dictate how the group operates. This structure and organization provide stability and continuity over time, ensuring that the group can continue to function effectively and efficiently. In contrast, informal groups often lack this structure and can be more prone to disbanding or falling apart due to a lack of direction or leadership.
Specific Purpose: Formal groups are usually created for a specific purpose, such as achieving a particular goal or completing a specific task. This shared purpose and common goal can provide motivation and a sense of direction for the group, which can help to keep members engaged and committed to the group's mission over the long term. Informal groups, on the other hand, may lack a clear purpose or goal and can be more likely to dissolve over time as members lose interest or move on to other things.