Which statement is accurate regarding log levels?

The statement that messages at the Info level occur during normal operation of your app is accurate. The Info log level is used to indicate routine operational messages which track the typical functioning of the application. This can include confirming that processes are running successfully or reporting the current status of various components without indicating any issues.

When analyzing the other statements, the Debug level, while useful for development and debugging purposes, does not indicate criticality; rather, it's meant for detailed logging that can help developers track the internal workings of the application. Messages at the Info level, as mentioned, report on routine operations rather than abnormal situations. Lastly, logging all messages at the Critical level would imply that every event is of the utmost concern, which is impractical for managing logs and monitoring application health effectively. Thus, understanding log levels is essential for effective application monitoring and debugging.