To have balance, elements in the picture work together without overpowering other elements. Not every image needs to be balanced, imbalance can be used as an effective compositional tool.
Here the scene is balanced by the diagonal progression of the tables. The scene is not weighted to one side or the other. The apparent weight of the tables anchors the image.
All of the elements slope downhill, the foreground rocks and the background sky and trees enhance the terraced building. Natural and artificial are in balance.
jnicklin photography 