Scenario: A DB2 database administrator wants to identify unused indexes in the database to improve performance. What approach would you suggest to accomplish this task?

Reviewing the SQL queries executed against the database can help identify indexes that are not being referenced in any query. This approach provides direct insight into the actual usage of indexes by the application. Analyzing index statistics or using the EXPLAIN feature may not always accurately identify unused indexes since they focus on statistical or execution plan analysis rather than actual query usage. Dropping and recreating indexes is a drastic measure that can potentially disrupt the database and is not necessary for identifying unused indexes.