Which feature in Revit allows for dynamic updates of linked CAD files?

The feature in Revit that enables dynamic updates of linked CAD files is linking. When you link a CAD file instead of importing it, Revit creates a connection to the original file rather than copying the data into the model. This means that any changes made to the linked CAD file are automatically updated in Revit whenever the model is refreshed. This dynamic relationship is crucial for maintaining consistency across project files and ensuring that all team members are working with the most current data.

In contrast, importing a CAD file would bring it into the Revit environment as a static object. Any changes made to the original CAD file would not be reflected in Revit unless the imported file is re-imported. Exporting is the process of sending Revit data to other formats and does not relate to updates in the source file. Embedding involves placing a file within another, which also does not provide the dynamic update capabilities that linking offers. Thus, linking is the best choice for ensuring that changes in CAD files are reflected within the Revit model seamlessly.