Answer: Access history

The question asks which Snowflake feature helps identify unused data for potential archiving or deletion. Access History (Option A) is specifically designed for this purpose, as documented in Snowflake's official documentation and confirmed by the community discussion with 100% consensus and upvoted comments. Access History tracks read and write operations, allowing administrators to discover unused data by analyzing query patterns and access frequency. Data classification (B) categorizes sensitive data but doesn't identify unused data. Dynamic Data Masking (C) protects sensitive data at query time. Object tagging (D) applies metadata labels to objects for organization and governance. Only Access History directly addresses the requirement of identifying unused data for archival or deletion decisions.

Author: LeetQuiz Editorial Team