The correct term to fill in the blank would be task structure. According to Fiedler's model, task structure refers to the extent that a job has guidelines for how the job should be completed. It is the degree of the arrangement contained in the duties that is performed by the group. It is focused in the amount of the structure that is in a task. This is because tasks that are structures have corresponding guidelines on how the job should be done and completed, the task leader would have more influenced and control over the members who are performing a certain task.