Avoid line/section breaks when converting to Word doc

I am using Acrobat for the first time, and am trying to convert a PDF to a Word doc. The main issue I am encountering is that there are breaks in text when it converts—sometimes sentences are split in half. I have been asked to convert from PDF to Word then format using Vellum by the document's author, and Vellum is then recognizing the mid-sentence breaks as "Untitled" sections.

Is there a way to convert to Word without these breaks? I gather it's related to where the text ends on each page of the PDF.

Apologies if this is a repeat or stupid question. I'm totally new to this, and nothing I've Googled so far has given me the answer I'm looking for.