A development team wants to enable autoscaling to handle variable loads for their Azure-hosted application. Which component provides this capability?

Azure Autoscale is the correct answer because it directly provides the functionality to automatically adjust the number of compute resources (like VMs or App Service instances) based on demand or a defined schedule. This ensures the application can handle variable loads efficiently. Availability Sets are used for high availability within a datacenter by distributing VMs across different fault domains, not for scaling resources up or down. Azure Load Balancer distributes incoming network traffic across multiple backend resources but doesn't scale them. Azure Application Gateway is a web traffic load balancer that enables you to manage traffic to your web applications, offering features like SSL offloading and WAF, but it doesn't inherently scale the backend resources itself.