Final answer:
The feature not characteristic of Zoser's mortuary complex is the use of massive columns, which is not present in his Step Pyramid and the surrounding buildings. option (a)
Step-by-step explanation:
The innovation that is NOT characteristic of Zoser's mortuary complex is the use of massive columns. Zoser's mortuary complex, including the Step Pyramid, was an architectural innovation of the Third Dynasty of Ancient Egypt and did not feature massive columns typical of other ancient structures. Zoser's complex is noted for innovations such as the stepped pyramid form, enclosed courtyard, and the elaborate wall carvings. Other ancient mortuary complexes around the world have massive columns as distinctive features, but this was not a characteristic of Zoser's structure.