Missing Menus in Mac Word

[professorveg]

For quite a while the top menus have been missing in Word, such as those that let you quickly change themes, margins, fonts, colors, etc. I don't remember how they went missing but I've not been able to figure out how to bring them back. I've attached a pic of the top of Word so you can see what I see. I hope someone can tell me how to find the missing menus because Word is almost inoperable without them. Thanks!