Consider the placement of the sky. The sky occupies two-thirds of the frame. Now consider the barn. It also occupies two-thirds of the frame. This composition is said to be in perfect balance.
Balance is an important element in composition.
Both positive and negative spaces are said to have weight. When an image appears to be tipping over or falling out of the frame there is an unequal distribution of weight caused by a lack of balance in the composition. We will discuss more on balance in a future article devoted to just this concept. I have been reading them with interest. Once again, this was very informative to me.