The walls of Great Zimbabwe's Conical Tower exemplify Shona architectural conventions because they utilize Ceramic-tile roofing Spolia taken from ancient Roman ruins Flying buttresses Ashlar masonry

## Step 1<br />The problem is asking us to identify the architectural convention that is exemplified by the walls of Great Zimbabwe's Conical Tower. The options provided are Ceramic-tile roofing, Spolia taken from ancient Roman ruins, Flying buttresses, and Ashlar masonry.<br /><br />## Step 2<br />The Great Zimbabwe's Conical Tower is known for its use of Ashlar masonry. Ashlar masonry refers to the use of finely dressed stone blocks in construction. This is a characteristic feature of Shona architecture, which is the architectural style of the Shona people, the builders of the Great Zimbabwe.<br /><br />## Step 3<br />The other options, such as Ceramic-tile roofing, Spolia taken from ancient Roman ruins, and Flying buttresses, are not characteristic of Shona architecture. Ceramic-tile roofing is more associated with Islamic architecture, Spolia taken from ancient Roman ruins is a feature of Romanesque architecture, and Flying buttresses are a feature of Gothic architecture.