Final answer:
The important relationship that occurs between the 3 sets of adjacent views is continuity. This principle is based on the Gestalt psychology concept that we tend to organize our perceptions into continuous and coherent forms.
Step-by-step explanation:
The important relationship that occurs between the 3 sets of adjacent views is continuity (option A). Continuity refers to perceiving smooth flowing lines instead of jagged, broken lines. This principle is based on the Gestalt psychology concept that we tend to organize our perceptions into continuous and coherent forms.
For example, when looking at an array of dots, we may group them according to the principle of similarity (option C), which refers to organizing similar elements together. However, the relationship between adjacent views is primarily characterized by continuity.