What does "PURGE" do in AutoCAD?

The function "PURGE" in AutoCAD is designed to enhance the efficiency and organization of a drawing by removing unused elements. This includes elements such as layers, blocks, styles, and line types that are present in the drawing but not actively utilized in the current design. By removing these unused elements, "PURGE" helps streamline the drawing file, reducing its size and ensuring that only necessary components are retained. This can lead to improved performance and makes it easier to manage the drawing, especially in complex projects.

While deleting selected objects removes specific items from the drawing, it does not address unused elements as comprehensively as "PURGE." Cleaning the current workspace does not specifically refer to removing unused elements and could be misinterpreted as adjusting the visual layout of the drawing. Lastly, saving the current drawing is a function dedicated to preserving your work but does not involve the deletion or cleaning of unused components. Thus, the primary and defining function of "PURGE" is its ability to remove these superfluous items, making option B the correct understanding of its role in AutoCAD.