Answer: A) an Egyptian pyramid.
Explanation: In the given excerpt from "Don Juan" by Lord Byron, we can see a description of the first pyramid erected by Egypt's King Cheops, to keep his memory and mummy, but the somebody opened the coffin and stole all of the treasures and Cheops remains. This poem, by Lord Byron is based on an image of an Egyptian pyramid, more specifically, the one from King Cheops.