Final answer:
Selma failed to provide Clearly Defined Expectations and Deadlines in the delegation process to Sue, leading to challenges in managing workloads and participating effectively in the project.
Step-by-step explanation:
The key element in the delegation process that Selma forgot when delegating the task to Sue is Clearly Defined Expectations and Deadlines. When delegating, it is crucial to specify your expectations upfront and to be accountable for the process and outcomes. Clear timelines are essential, particularly in circumstances where the team has to balance multiple priorities, such as other funded projects, and is under pressure due to external factors like changes in administration or funding threats. Selma's failure to provide clear expectations and deadlines likely hindered Sue's ability to manage her workload effectively and to participate eagerly and with interest in the project, ultimately impacting the planning process adversely.