The literary device that Gordimer employs in the excerpt is Imagery.
Imagery is a literary device used to represent objects, actions, and ideas in such a way that it appeals to our physical senses. Usually it is thought that imagery makes use of particular words that create visual representation of ideas in our minds.
Yikes your poor brain mine would sizzle and die
The "long march" of China was led by Mao Zedong so its C.
By selling Louisiana to the U.S. in 1803, Napoleon obviated the need to defend it against the British, and he may have hoped that the need of the U.S. to defend the territory (against the British) might have brought America back to its alliance with France.
Hope this helps