Final answer:
A leader resolving disputes is engaging in A) Interaction-facilitation, which is a leadership behavior focused on resolving conflict and supporting group dynamics.
Step-by-step explanation:
When a leader is resolving disputes, he or she is engaging in behaviors that are A) Interaction-facilitation. This involves leaders who promote group interaction and strive to resolve conflicts among members. This leadership function is often seen in expressive leaders, who focus on promoting emotional strength and health while making sure that everyone feels supported and heard. In contrast, behaviour directed at improving work through support and encouragement during task execution can be classified as B) Supportive work-facilitation. C) Achievement-oriented behavior revolves around setting challenging goals, with a strong focus on performance and excellence. Lastly, D) Path-goal clarifying involves the leader providing clear goals and directions to help followers understand the path to achieve these goals.