The screenshot shows the common items to be inserted into a PowerPoint Presentation. Being on a Mac, of course we are handicapped on not having mnemonics support to perform the action by the keyboard. Or are there some shortcuts to do these?
The point here is that needing to hunt for the menu item with the mouse and then click on the item is way slow compared to keyboarding.
Update: An answer was provided with a link to the shortcuts provided by MS online help. I should have noted that link had already been pored over and does not mention any shortcuts for "Insert" items.