Final answer:
The artwork that begins as rubbings from textured surfaces is #334 Drawing (Tracings from the LA River and Arcelor Mittal Steel). Ernst, a surrealist artist, used a process called frottage or decalcomania to reproduce textural images on paper.
Step-by-step explanation:
The artwork that begins as rubbings from textured surfaces is b. #334 Drawing (Tracings from the LA River and Arcelor Mittal Steel).
Ernst, a surrealist artist, invented a process called 'frottage' or 'decalcomania', where he would place paper on top of a textured surface and rub it with pencils or crayons. This process reproduced the textural image on the paper. This technique allowed Ernst to create artworks that reflected the subconscious brutality of war.