Answer: AWS Database Migration Service

AWS Database Migration Service (DMS) is specifically designed to help migrate databases to AWS quickly and securely. It supports migrating Oracle databases and many other commercial and open-source databases. During migration, the source database remains fully operational, minimizing downtime for applications that rely on the database. - **AWS VM Migration Service** is not an actual AWS service - this might be referring to AWS Application Migration Service (formerly CloudEndure Migration) which is for server migration, not database migration. - **AWS Inspector** is a security vulnerability assessment service, not for database migration. - **AWS Trusted Advisor** provides optimization recommendations for cost, performance, security, and fault tolerance, but doesn't handle database migrations.

Author: Ritesh Yadav