Concept:
Modern businesses often transfer certain operations or services to external agencies to reduce costs and improve efficiency.
Step 1:
Outsourcing means assigning specific business tasks or services to an outside company or third party.
Step 2:
Business Process Outsourcing (BPO) refers to contracting business operations such as customer support, payroll, or data processing to specialized external firms.
Step 3:
• Moonlighting means doing an additional job besides the primary job.
• Virtual business refers to online business operations.
• Third party evaluation is related to assessment and auditing.
Step 4:
Hence, the correct term is Business Process Outsourcing (BPO).
\[
\boxed{\text{(1) Business Process Outsourcing (BPO)}}
\]