Step 1: Identify the inventor and the technique. The question refers to Ludwig von Siegen (misspelled in the prompt), who invented the Mezzotint process in the 17th century.
Step 2: Analyze the function of Mezzotint. Mezzotint is an intaglio technique designed to create tonal areas, moving from dark to light. The artist systematically roughens the entire plate to print a solid black, then creates the image by smoothing and burnishing areas to make them hold less ink and thus appear lighter.
Step 3: Compare its function to the options. Aquatint is another intaglio technique specifically developed to create tonal effects, though it works through a different process (pitting the plate with acid through a porous ground). Functionally, both Mezzotint and Aquatint are methods for creating tone in intaglio prints, as opposed to the linear qualities of drypoint, or the relief nature of linocut and woodcut. Mezzotint is considered a "dry" (non-acid) tonal method, while aquatint is a "wet" (acid-based) tonal method. In this context, Aquatint is the most closely related technique in function.
{Note: The question is slightly ambiguous. While Mezzotint is a distinct process, its purpose of creating tone is shared with Aquatint, making it the best fit among the choices.}