"Though this picture is simple. I have done black and white photography for many years and my favorite element of design is contrast. The contrast in this photo takes it from simple to interesting." I think this a fine example of contrast/black and white.
This is a good example of food photography because anyone who has ever cooked with mushrooms knows that specific texture of that particular part of every mushroom. I can almost feel it on my finger tips just from looking at this photo.
Pentti Sammallahti's best photograph: ice fog in stormy northern Russia