There are plenty of examples here on how you can show or hide parts of the document based on form field changes. My preferred choice for efficiency is to use Content Controls rather than the legacy form fields and bookmarks like in your document but the concept is the same.

See
https://www.msofficeforums.com/word-...tion-text.html
https://www.msofficeforums.com/word-...-document.html
https://www.msofficeforums.com/word-...rked-text.html

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Andrew Lockton
Chrysalis Design, Melbourne Australia