I HAVE NO IDEA!!
Commands provide access to a program's functions.
Yes; it basically replaces the menu. You might also say it is a fancy menu.
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The menu bar contains a list of commands.
MENU
Start Menu
submenu
full menu
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a list of additional commands is a sub-menu
To open a menu that contains commands for working with files, you typically click on the "File" menu located in the top menu bar of most software applications. This menu usually includes options such as "Open," "Save," "Save As," and "Close." In some applications, you can also access this menu by right-clicking in the document area or using keyboard shortcuts like "Ctrl + F" or "Alt + F."
menu