Answer:
Mail Merge.
Explanation:
Microsoft Word refers to a word processing software application or program developed by Microsoft Inc. to enable its users type, format and save text-based documents.
Microsoft Access can be defined as a software application or program designed by Microsoft corporation to avail end users the ability to create, manage and control their database.
A Mail Merge is a Microsoft Word feature that avails end users the ability to import data from other Microsoft applications such as Microsoft Access and Excel. Thus, an end user can use Mail Merge to create multiple documents (personalized letters and e-mails) at once and send to all individuals in a database query or table.
Hence, the Word feature that would allow you to insert fields from an Access database into multiple copies of a Word document is called Mail Merge.