Final answer:
The circular wall of Great Zimbabwe is made of coursed granite blocks, which is true. option a is correct
Step-by-step explanation:
Great Zimbabwe was an emblem of a prosperous and hierarchical society, indicative of the separation between the ruling elite and the common people. The region encompasses several stone structures including the Hill Complex, the Great Enclosure, and the Valley Ruins, covering roughly 1,700 acres.
These architectural feats highlight the sophisticated organization and the strategic importance of Great Zimbabwe within its trade networks that extended to the Indian Ocean and beyond, dealing chiefly in ivory and gold. Moreover, the Great Enclosure underwent renovations between the thirteenth and fourteenth centuries, featuring a main entrance and a conical stone tower that possibly functioned as a granary.
The historical significance of Great Zimbabwe remained obscured until the country's independence in 1980, option a is correct