Which command merges two or more objects into a single object in AutoCAD?

The JOIN command is used in AutoCAD to merge two or more objects into a single entity. This command is particularly useful for unifying geometric shapes that share endpoints or align with each other. When objects such as lines, arcs, or polylines are selected, JOIN can convert them into a single object, which can simplify the drawing, streamline editing, and improve the organization of the drawing elements.

For example, if you have two lines that meet at a corner, using the JOIN command can consolidate those lines into one continuous line, thereby enhancing the overall efficiency of the design process. This is especially beneficial in architectural and engineering contexts where precise geometry is crucial.

Other commands such as COMBINE, CONNECT, or MERGE do not exist in standard AutoCAD terminology, highlighting that JOIN is indeed the correct choice for the task of merging objects into a single one. In AutoCAD, understanding the available commands and how they interact with objects is essential for effective drawing and modeling practices, which is why recognizing JOIN as the correct command is vital for mastery of the software.