Final answer:
In music, the combination of tones that is stable and restful is called consonance, which creates a sense of relaxation and is often achieved through harmonizing intervals. Consonance can also refer to visual harmony in the arts, exemplified by the use of analogous colors.
Step-by-step explanation:
A combination of tones that is considered stable and restful is called consonance. In music, consonance refers to the combination of tones that produce a sense of relaxation and stability in the listener. It is often achieved through the use of tones that harmonize well together, such as when notes are combined at certain intervals that are pleasing to the ear. These intervals typically include thirds, fifths, and octaves. Consonant combinations are the opposite of dissonant combinations, which create a sense of tension and the desire for resolution.
The concept of consonance is not just limited to music but can also be seen in visual arts, where colors and forms that are symmetrical or balanced can also be described as creating a consonant and restful impression. An example of visual consonance is the use of analogous colors, which are colors next to one another on the color wheel that blend together smoothly, as they promote harmony and balance in a composition.