You need to implement an Azure platform as a service (PaaS) service that will host a relational database. The solution must support built-in autoscaling. Which service should you implement?

Azure SQL Database is a PaaS service where Microsoft manages the underlying infrastructure. Its serverless compute tier automatically scales compute resources up and down based on workload demand, and the Hyperscale tier provides automatic storage scaling - both without manual intervention or downtime.

SQL Server on Azure Virtual Machines is an IaaS offering, not PaaS; the customer manages the OS and SQL Server instance and must configure autoscaling manually.

Azure SQL Managed Instance is a PaaS service but is designed for near-100% SQL Server compatibility for lift-and-shift migrations and does not offer the same serverless autoscaling capability as Azure SQL Database.

Azure SQL Edge is a lightweight relational engine optimized for IoT and edge computing scenarios, not a general-purpose cloud PaaS database with built-in autoscaling.