Step 1: Understanding the question.
The question is asking for the management function that is continuous because of the creation of new jobs and the departure of employees.
Step 2: Analyzing the options.
- Planning: Involves setting goals and strategies, but is not necessarily continuous in the context described.
- Organising: Involves arranging resources and tasks but is not a continuous process like staffing.
- Staffing: This refers to the process of hiring, training, and maintaining a workforce. It is a continuous process as businesses need to replace employees and adjust to new needs.
- Controlling: Involves monitoring and adjusting, but it is not continuous in the same way staffing is.
Step 3: Conclusion.
The correct answer is Staffing, as it is an ongoing process in organizations due to employee turnover and changing business needs.
Final Answer:
\[
\boxed{\text{The correct answer is (3) Staffing.}}
\]