Which AWS service provides encryption at rest for Amazon RDS and for Amazon Elastic Block Store (Amazon EBS) volumes?

Explanations:

AWS Lambda is a serverless computing service that runs code in response to events. It does not provide encryption for data at rest for RDS or EBS volumes.

AWS Key Management Service (AWS KMS) is used for managing cryptographic keys and provides encryption at rest for Amazon RDS and EBS volumes by integrating with them.

AWS WAF (Web Application Firewall) is a security service for protecting web applications from attacks. It does not provide encryption for RDS or EBS.

Amazon Rekognition is a service for image and video analysis. It does not provide encryption services for data at rest in RDS or EBS volumes.