Which service should an organization use to collect, analyze, and visualize metrics and logs from its Azure resources?

Azure Monitor is the correct choice because it provides a comprehensive solution for collecting, analyzing, and acting on telemetry from your Azure and on-premises environments. It gathers metrics, logs, and traces, offering insights into application and infrastructure performance and health. Azure Advisor provides recommendations for optimizing Azure resources, but it doesn't collect or visualize metrics and logs. Azure Key Vault securely stores and manages cryptographic keys and other secrets, which is unrelated to monitoring. Azure Arc extends Azure management to on-premises, multi-cloud, and edge environments, but it's not a monitoring service itself.