Which AWS service integrates with other AWS services to manage and provide encryption for data at rest?

AWS Key Management Service (KMS) is the correct answer because it's a managed service that makes it easy to create and control encryption keys used to encrypt your data. KMS integrates with many other AWS services (like S3, EBS, RDS) to provide encryption for data at rest, ensuring data security without you having to manage the underlying hardware security modules. AWS Certificate Manager (ACM) manages SSL/TLS certificates for your AWS resources, primarily for data in transit, not encryption of data at rest. AWS Identity and Access Management (IAM) controls access to AWS resources, defining who can do what, but doesn't directly provide encryption for data at rest. AWS Security Hub is a security posture management service that aggregates security findings, not an encryption service.