No. A macro would be required for that. See: Word 2010 template form field (If checkbox is checked display another field else do not display)

Alternatively, to simulate a combobox, see: https://www.msofficeforums.com/17071-post2.html
When you insert a dropdown formfield into a document, Word gives it a default bookmark name (e.g. Dropdown1). You can see that when you examine the formfield's properties; you can also delete it or change it to something else.
Your table does have vertically merged cells. See item 8. Furthermore, the macro isn't designed to work with nested tables, so I don't know how you'll get along with that.

PS: It would be preferred for you to attach files here, rather than linking to them on another site. You can do that via the paperclip symbol on the 'Go Advanced' tab at the bottom of this screen.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]