Is the printmaking process in which lines are incised into the surface of a plate.
a. intaglio
c. etching
b. engraving
d. relief printing

Intaglio is the print making process in which lines are incised into the surface of a plate.The correct option among all the options given in the question is option "a". Normally this kind of printing is done on plates made of zinc and copper.  Actually the incision made on the plates hold the ink to create a permanent marking.

The answer is a : varying the size of objects or subjects, so that some are smaller than others and the illusion of depth is created.hope this : )

Answerborromini;