Isocephaly refers to what characteristic in art?

Isocephaly is a specific compositional technique used in art where the heads of figures are placed on the same horizontal level, creating a uniformity that emphasizes the figures' importance within the artwork. This technique is particularly common in the context of historical or narrative painting, where maintaining the alignment of heads helps to unify the composition and draw the viewer's attention to the characters and their interactions. By positioning the heads at the same height, the artist can create a clear focal point and maintain balance in the visual structure, making it easier for the viewer to engage with the subject matter. This practice can also reflect a sense of equality among the figures depicted, reinforcing themes of unity or collective experience. The other options—relating to color use, depth perception, and abstract compositions—do not specifically address the distinctive characteristic of isocephaly, which centers on the arrangement of figures in regard to their heads.