There are two types of intaglio printing etching and engraving. which is the primary difference between the two

The key difference of etching from engraving, is the use of acid to actually remove the metal, rather than to cut into the surface with a tool.

answer; i believe that the correct answer is (digital zoom);

the sculpture i am pretty sure you are talking about is the statue b. the david statue now lives in the galleria dell'accademia, florence, italy. it was made by ‎michelangelo.