The correct answer is "Warning" as it represents the threshold at which potentially harmful situations are logged. Events at this level are considered serious but not necessarily immediate threats. In most structured logging systems, the Warning level is designed to capture events that might lead to errors if not addressed. The levels that are less severe, such as Notice and Informational are not selected, as they would include a larger number of events, many of which could be considered normal activity and not warnings. The "Emergency" level, while severe, would not capture all warnings as it is the highest level, used for system-wide non-recoverable errors.