Azure App Service is an example of which cloud service model?

Azure App Service is a Platform as a Service (PaaS) offering. With PaaS, Azure manages the underlying infrastructure (operating systems, virtual machines, network, etc.), and developers focus solely on deploying and managing their applications and data. This provides a balance between control and ease of management. SaaS (Software as a Service) would mean Azure manages the entire application, and users only interact with it (e.g., Microsoft 365). IaaS (Infrastructure as a Service) would require users to manage the operating systems and applications themselves on virtual machines provided by Azure (e.g., Azure Virtual Machines). DRaaS (Disaster Recovery as a Service) is a specific use case, not a general cloud service model for application hosting.