A developer must securely manage application secrets and keys in Azure. Which service is designed for this?

Azure Key Vault is the correct choice because it is a cloud service specifically designed to securely store and manage secrets, such as API keys, passwords, certificates, and cryptographic keys. This helps developers protect sensitive information from unauthorized access and ensures compliance with security best practices. Azure Monitor is used for collecting, analyzing, and acting on telemetry data from your Azure and on-premises environments. Azure Policy helps enforce organizational standards and assess compliance at scale. Azure Security Center provides unified security management and advanced threat protection across hybrid cloud workloads. While these services contribute to overall security, only Key Vault directly addresses the secure management of application secrets.