Which of the following types of files can authors import into an existing Content Fragment?

Authors can import text files into an existing Content Fragment due to the nature of how Content Fragments are designed to manage and represent structured content. Content Fragments are primarily used to handle textual information in a modular and reusable way, making it easy to incorporate text-based data into digital experiences. By allowing the import of text files, Content Fragments maintain their core function of organizing and reusing text content across various platforms and presentations.

Text files provide a straightforward method for authors to integrate pre-existing textual information into the structured format of a Content Fragment. This is particularly useful for maintaining consistency across content pieces and ensuring that text is easily editable and updatable within the Content Fragment's ecosystem. The focus on text-based content aligns with the overarching role of Content Fragments in managing written material across digital applications.

In contrast, the other file types—videos, PDF files, and audio clips—are not designed for direct import into a Content Fragment. While these media types are essential for enriching content in a broader digital strategy, they do not fit within the structured text-based environment that Content Fragments are intended to support. This distinction clarifies why text files are the only type specified that can be imported effectively into an existing Content Fragment.