Which of the following roles is considered task-oriented in a group?

The role identified as "Expert" is considered task-oriented within a group because it primarily focuses on the completion of specific tasks through the application of specialized knowledge and skills. The expert contributes by providing critical information, insights, and solutions that help the group achieve its objectives effectively and efficiently. This role is essential in driving the group towards its goals, as the expert's contributions facilitate informed decision-making and enhance the problem-solving process.

In contrast, the other roles mentioned serve different purposes within a group dynamic. Individuals in encouraging roles typically focus on motivating members and fostering an inclusive atmosphere, while mediators work on resolving conflicts and promoting cooperative interactions among group members. Harmonizers strive to maintain cohesion and address emotional needs within the group, which is crucial for group morale but not directly related to task completion. Thus, the role of the expert stands out as being distinctly aligned with the task-oriented functions of a group.