It's harmony because of the complementary colors and the way the figures are proportioned in the piece.
I think it is C Hope this helps
God Bless and have a good day
In his painitng Christ Entering Jerusalem, <span>the artist Duccio pioneered the use of architecture to define space and direct movement.
In art, Define space is a technique to left some part of the canvas unoccupied and direct movement is a technique that try to capture a moving subject/object into artform, and both of these techniques could be seen on the painting.</span>
