Can you give me an example of a binary form that might occur in nature or visual arts?

An example of binary form in nature is the distinct day-night cycle, where the presence of sunlight contrasts with darkness, creating a clear dichotomy. In visual arts, a classic example is the use of complementary colors, such as blue and orange, which create a striking balance and tension when paired together, highlighting the differences between the two hues. Both instances illustrate the interplay of opposing forces that can enhance perception and experience.