AWS Certified Solutions Architect Professional Practice (SAP-C02) Practice Exam

Messaging across multiple channels to engage customers is handled by Amazon Pinpoint. Pinpoint is built for multi-channel customer communications, letting you send emails, SMS messages, and push notifications, while also providing audience segmentation, campaigns, and engagement analytics to measure and optimize outreach.

AWS Amplify is a development framework that can leverage Pinpoint for push notifications but isn’t itself the dedicated messaging service for customer engagement. AWS IoT Device Defender focuses on security for IoT devices, not customer messaging. Amazon API Gateway manages APIs, not messaging channels.

So, the service that provides these messaging channels is Amazon Pinpoint.