An Andy Goldsworthy Picture

As I watched the movie on Mr. Goldsworthy, I noticed he likes to "work with nature"; Altering the landscape to his liking. He changes the landscape mostly into either a circle pattern (like above) or a wavy, river like pattern. Why? I wish I knew. I'm assuming that those patterns spark intrest and/or inspiration for his work. This picture is well construced: light balance is good, Contrast is good (dark green brings out yellow's lightness), the angle from which this picture is taken is excellent (the bushell of flowers takes up the entire area of the portrait).