What constitutes an example of system activity monitoring?

System activity monitoring specifically involves observing and recording various activities and events that occur within a computer system or network. In the context of the choices provided, tracking system restarts and shutdowns is a key part of this monitoring process. By keeping a log of when systems start up and shut down, administrators can identify unusual patterns or potential issues that could indicate security problems or system malfunctions. This type of activity monitoring is essential for ensuring system reliability and security, as it allows for the detection of anomalies that might suggest unauthorized access or other significant events impacting system integrity.

The other options refer to different contexts, such as employee performance management, project tracking, or human resources functions, none of which pertain directly to the monitoring of system-level activities within IT infrastructure.