The panel screen is an excellent of how harmony is created in artwork. What is the most obvious concept that has helped to create harmony in this piece

Without further context or information about the specific piece, it is challenging to determine the most obvious concept that has helped create harmony. However, some key concepts often employed for creating harmony in artwork include:

1. Color harmony: The use of a limited and cohesive color palette, such as complementary colors or analogous colors, can create visual unity and harmony within a piece.
2. Composition: A well-balanced arrangement of elements, such as the placement of objects or the distribution of visual weight, can create a sense of harmony.
3. Repetition and rhythm: The repetition of shapes, lines, or motifs throughout the artwork can establish a rhythmic flow, contributing to a sense of harmony.
4. Balance: Achieving visual balance between different elements, such as through symmetrical or asymmetrical arrangements, can help create harmony.
5. Proportion and scale: Maintaining appropriate proportions and scaling of elements can contribute to a harmonious composition.

Without further information about the specific artwork or its visual characteristics, it is difficult to pinpoint the most obvious concept that has helped create harmony.