Which methods can be used for reading text from a native .pdf document?

The method of reading text from a native .pdf document involves using the specific activity designed for this purpose. Utilizing the "Read PDF with Text" activity is appropriate as it is tailored to extract text from a PDF file effectively. This activity directly interacts with the PDF format and is optimized to handle the data extraction while considering the structure of the PDF.

In contrast, while the other methods mentioned may involve text extraction, they are either not specifically designed for native PDFs or are more suited for different types of documents or scenarios. For example, "Get PDF Data" is not a standard method recognized for extracting text, and while OCR activities are useful for extracting text from images or scanned documents, they may not be necessary or efficient for native PDFs, where text can be accessed directly. Lastly, using UI Automation to open a PDF reader and extract text is a more cumbersome approach that depends on the availability of the UI and does not leverage the advantages of specialized PDF processing activities.