Which is a feature of proportion in design?
a.
the pleasing effect created by balanced sizes of shapes on opposing sides
b.
the harmonious relationship of parts to each other and to the whole
c.
an appeal created by adding rhythm to the design

the correct answer for this question is:

it is system invented in 1872 that produced the first illusion of movement. basically it was a disk with a series of drawings around the edge, showing the same object in slightly different poses. when it was spun, it created the illusion of movement.

found this online : )

answer/// priests singing psalms and the congregation singing responses;