Which element of art creates edges of shapes and visual cues for the viewer in terms of both motion and space?
a. emphasis
b. form
c. line
d. unity

The element of art that creates edges of shapes and visual cues for the viewer in terms of both motion and space is line. The correct option among all the options that are given in the question is the third option or option "c". The lines have the ability to create a sense of motion when drawn in spaces. 

The correct answer for the question that is being presented above is this one: "c. line." The element of art creates edges of shapes and visual cues for the viewer in terms of both motion and space is the line. Line is one of the basic elements of art.