What type of change occurs within a group, affecting size or structure?

The correct answer is internal change. This type of change occurs within a group and directly impacts its size, structure, or dynamics. Internal changes can manifest in various forms, such as shifts in membership, alterations in roles and responsibilities, or changes in policy or governance. These changes can significantly influence how the group operates and interacts, shaping its identity and effectiveness.

In contrast, external changes refer to influences that come from outside the group, such as societal shifts, economic factors, or environmental changes that can affect the group but do not originate from it. Temporary changes are those that are not permanent and might only last for a defined period, while radical changes usually entail substantial transformations that can completely alter the group's nature or function. Internal change, therefore, is more focused on the inherent modifications that occur within the group itself.