Final answer:
Prishna can use the File Attachment tool on the Design tab to allow forms to display user files like PDFs stored in an underlying field. Other tools like Image, Hyperlink, and Text Box have different purposes and are not appropriate for this function.
Step-by-step explanation:
You asked about the tools available on the Design tab that would allow the form Prishna designs to display to users files stored in an underlying field. The correct tool for this function is the File Attachment.
The File Attachment tool allows users to attach files, such as PDFs of invoices or estimates, to a database record. This attachment can then be accessed through the form by the employees who are maintaining the records. It provides a convenient way to store and access documents directly within the form interface.
Other options, like Image, are typically used for storing pictures within the form. A Hyperlink can link to external resources or pages, and a Text Box is used for entering and displaying text, not files.