Which command would you use to delete an empty directory?

To delete an empty directory, the command that should be used is "rmdir." This command is specifically designed for removing directories, but it only works if the directory is empty. If a directory contains files or other directories, "rmdir" will not execute the deletion, ensuring that items are not unintentionally lost.

The other commands provided serve different purposes: "rm" is generally used to remove files and can also delete non-empty directories with the use of particular flags, which increases the risk of unintentionally removing significant content. "cd" is used for changing directories and does not involve deletion at all. "mv" is meant for moving or renaming files and directories and is not related to deletion. Thus, "rmdir" is the most appropriate and safest command for deleting an empty directory.