Lower operational burden is the correct option because a fully managed AWS service shifts routine operational tasks off your team and onto the provider.

A managed service removes responsibilities such as infrastructure maintenance, operating system and software patching, automatic scaling, and many aspects of availability and fault handling, so your engineers can focus on the analytics workload and business logic rather than server upkeep.

Backups are unnecessary is incorrect because managed services do not eliminate the need for data protection and recovery planning and you still must enable and test backups and restores as part of your responsibilities.

Greater control and flexibility is incorrect since self-managing on EC2 usually gives more low level configurability and tuning, and managed services trade some of that fine grained control for operational simplicity.

Automatic multi-Region replication by default is incorrect because most AWS managed services are regional and require explicit setup or additional features and cost to replicate data across regions.

Full AWS Practitioner Certification Question