Final answer:
An individual role within a group refers to the specific responsibilities and actions carried out by one member of the group. In the given options, the member who evaluates the group's performance toward a standard would be identified as an individual role.
Step-by-step explanation:
An individual role within a group refers to the specific responsibilities and actions carried out by one member of the group. In the given options, the member who evaluates the group's performance toward a standard would be identified as an individual role. This role involves critically assessing the group's progress and determining how well it aligns with set standards or goals.