Amazon RDS
RDS is a relational database.
It is not an event bus that routes events to targets by rules, so it is incorrect.
Which serverless event bus receives events from various AWS services and SaaS apps and routes them to the appropriate targets (such as Lambda) according to rules you define?
Choosing the event bus that routes events by rules.
Amazon RDS
RDS is a relational database.
It is not an event bus that routes events to targets by rules, so it is incorrect.
Amazon S3
S3 is object storage.
It is not an event bus that routes events by rules, so it is incorrect.
Amazon EventBridge
Correct. Amazon EventBridge receives events from AWS services, your own apps, and SaaS, and routes events matching the rules you define to the appropriate targets (such as Lambda, SQS, and Step Functions) — a serverless event bus. It is used as the core of event-driven architectures.
Amazon EBS
EBS is block storage that attaches to EC2.
It is not an event bus that routes events by rules, so it is incorrect.
'Routes events by rules' and 'event bus' point to Amazon EventBridge. Simple one-to-many broadcast is SNS, and ordered message processing is SQS — use them accordingly.