Which type of log contains information about system startups and backups?

The System Log is specifically designed to provide information about the operating system's core activities, including system startups, shutdowns, and backups. It records events that are critical to the stability and health of the system, offering insights into any issues that arise during these processes. This log captures data on important system-level events that help administrators monitor and maintain the overall performance of the operating system.

In contrast, the Event Log encompasses a wider range of events across applications and system processes, and while it does include some startup events, it is more general. The Audit Log focuses primarily on security-related events, tracking user access and changes to data, not system health or performance. The Application Log records events from individual applications, reporting on their specific operations rather than the overall system status. Thus, the System Log is the most relevant answer for tracking system startups and backups.