What is the managed service that simplifies the creation and control of encryption keys for data?

The correct answer highlights AWS KMS, which stands for Key Management Service. This service is specifically designed to facilitate the creation, storage, management, and control of encryption keys used to secure your data across various AWS services.

AWS KMS provides a centralized way to manage keys securely while also helping you comply with data protection regulations, as you can control who can use the encryption keys and when. It allows for integration with other AWS services, simplifying the process of data encryption and helping users easily implement encryption strategies without having to manage the underlying hardware or software.

The other services listed do not focus on key management. AWS Shield Advanced is focused on DDoS protection, Amazon GuardDuty offers threat detection for your AWS infrastructure, and Amazon Detective helps in security investigations by analyzing and visualizing security data. None of these services are designed for the creation or management of encryption keys, which is the core functionality of AWS KMS.