A developer needs feature toggles to hide unreleased features in a web application until they're ready. Which solution meets this requirement for managing feature flags and toggling them on or off?

AWS AppConfig is specifically designed for managing application configurations, including feature flags. It allows developers to create configuration profiles, define flag values, and deploy them to applications. AppConfig supports controlled deployments, rollback capabilities, and integration with CloudWatch for monitoring, making it ideal for safely toggling features on and off. AWS AppSync is a managed GraphQL service and is not primarily designed for feature flag management, although it could store data that represents flags. Amazon DynamoDB is a NoSQL database service; while it could store feature flag data, it lacks the built-in deployment and management features that AppConfig provides for configuration changes. DynamoDB Streams are for capturing item-level changes, not for managing feature toggles directly. AWS Amplify DataStore is an on-device persistent storage library for web and mobile applications, primarily for offline data access and synchronization, not for centralized feature flag management.