Step 1: Understanding the question.
The question addresses how a manager can manage more work than they can handle by offloading some of the tasks.
Step 2: Analyzing the options.
- Delegation of Authority: Delegation allows a manager to pass on specific tasks and responsibilities to subordinates, freeing up their capacity.
- Span of management: Refers to the number of subordinates a manager supervises, not a tool for offloading work directly.
- Direct communication: Helps in conveying instructions but does not directly offload work.
- Close supervision: Involves more monitoring, which increases the manager's workload, rather than reducing it.
Step 3: Conclusion.
The correct option is Delegation of Authority because it directly allows a manager to transfer tasks to subordinates, thus reducing their workload.
Final Answer:
\[
\boxed{\text{The correct answer is (1) Delegation of Authority.}}
\]