Which function is primarily concerned with the integration of efforts among task force members?

The function that is primarily concerned with the integration of efforts among task force members is directing. This process involves guiding and overseeing the activities of team members to ensure that they work effectively towards a common goal. Through directing, a leader is able to communicate objectives, provide motivation, and facilitate collaboration among team members. This is particularly important in a task force setting where diverse skills and perspectives must be aligned to achieve results.

In contrast, organizing entails structuring resources and tasks to enable efficient workflow, while controlling focuses on monitoring performance and making adjustments as needed. Personnel planning, on the other hand, involves forecasting and managing human resources to meet future organizational needs. While these functions are important in their own right, they do not specifically deal with the integration and guidance of team efforts in the same way that directing does.