A retail company runs an order-processing platform on AWS. When an order is placed, several independent downstream systems must react: an inventory service, a fraud-detection service, and a shipping service. These systems are developed by separate teams and change frequently. The architecture team wants a fully managed, event-driven design where the order service publishes events without knowing which consumers exist, and where routing rules can filter events by content (for example, only high-value orders go to fraud detection) without modifying the producer. Which AWS service best meets these requirements?