Because Tim is responsible for staffing the team, delegating responsibility and authority for carrying out the plan, and monitoring results, what is he?

Manager

Explanation:

A manager is a person or a personnel in any organization or firm who is responsible for administering or controlling the activities of the organization or the firm.

They have the powers and responsibilities that is granted by the organization. A manger is mainly responsible for such things that includes staffing and assigning work tasks, and and also to monitor the results. They are the one  who secures resources, do planning, execute the strategies and organize the activities.

Thus in the context, Tim is given the responsibility to staff the team, delegate the responsibilities and authorize the plans and strategies. He is also responsible for monitoring the results. Thus Tim is in the position of a manager.

i suggest it is anadiplosis

definition was not one of the four methods