Which Azure service enables repeatable infrastructure deployment with JSON templates?

Azure Resource Manager (ARM) is the correct answer because it provides a management layer that allows you to create, update, and delete resources in your Azure subscription. It uses declarative JSON templates, known as ARM templates, to define the infrastructure you want to deploy. This enables repeatable deployments, ensuring consistency across environments. Azure Monitor is incorrect because it's used for collecting, analyzing, and acting on telemetry data from your Azure and on-premises environments, not for infrastructure deployment. Azure Policy is incorrect as it helps enforce organizational standards and assess compliance at scale, rather than deploying resources. Azure AD Connect is incorrect because it synchronizes on-premises directories with Azure Active Directory.