Trees, shadows, detailed ground
The object being referred to in this item is the medium. The answer is letter D. Some of the most common material used by the artists are oil paints, tempera, marbles, and bronze. This is the physical object used by the artists to convey their messages to audiences through the senses.
Answer:
Five segments equal to the size of the eye would go across a person's head. One on each side of the actual eye and one in the middle. The eyes go about halfway down the head.
Example (not my drawing btw):