Which method can be used to close a running application?

The most effective method to close a running application indicated in this scenario is to send Alt+F4. This keyboard shortcut is widely recognized in various operating systems as a command to close the active window or application. When invoked, it simulates the action that a user would take, effectively triggering the application's close operation as if the user manually closed it, allowing for any necessary prompts or confirmation dialogs to be presented by the application.

Sending the Alt+F4 command is a straightforward approach that works seamlessly within graphical user interfaces. It is often used in automated processes as a means of programmatically closing applications without needing to navigate through menus or execute more complex operations.

While other methods like pressing Ctrl+Alt+Delete can help access task management tools, they are more suited for system-level interventions rather than application-specific closures. The Kill Process activity, while capable of forcibly terminating applications, doesn’t allow for graceful shutdowns which can lead to data loss or corruption. The Send Window Close command can be effective but may not always be supported by all applications or might require additional setup depending on the context.

This makes sending Alt+F4 an efficient and user-friendly approach for closing applications in scripting and automation scenarios.