Answer:
A. Similarities in shape and color.
Step-by-step explanation:
In this example, we can see that the author created a picture that resembled the surface of the moon. This photograph is made up mostly of circles, and the whole image has a yellowish color. The fact that there are such similarities in shape and color contributes to creating harmony in the image. Harmony is a principle of art that attempts to create cohesiveness and unity. This principle uses elements such as color, shape, form, etc. to highlight the similarities of separate but related parts.