Which service enables a logistics company to automate workflows between Azure services and external applications using a visual designer?

Azure Logic Apps is the correct choice because it provides a visual designer to create automated workflows and orchestrate processes between various Azure services, SaaS applications, and on-premises systems. This low-code/no-code approach is ideal for integrating disparate systems and automating business processes for a logistics company. Azure DevOps is incorrect because it's a suite of development tools for software delivery, not for orchestrating workflows between services. Azure Automation is used for automating tasks and managing resources, often through PowerShell runbooks, but lacks the visual designer and extensive connector library for broad integration that Logic Apps offers. Azure Functions is a serverless compute service for running small pieces of code (functions) in response to events, and while it can be part of a workflow, it doesn't provide the visual orchestration capabilities of Logic Apps.