Final answer:
The left panel of the Annunciation Triptych by the Workshop of Robert Campin depicts Joseph in his workshop.
Step-by-step explanation:
The left panel of the Annunciation Triptych by the Workshop of Robert Campin depicts 3) Joseph in his workshop. It is one of three parts of a triptych, which is a work of art divided into three sections. The center panel typically presents the main scene, which in the case of the Annunciation Triptych is the Annunciation itself. In this center panel, we see the Angel Gabriel announcing to Mary that she will conceive Jesus Christ. Joseph's inclusion in the left panel provides a narrative context to the central event of the Annunciation depicted in the triptych's center panel.