This is an appealing image and does illustrate a few compositional 'guidelines' which are worth noting.
(1) The trees are leaning inwards on both sides of the frame, thus drawing the eye into the composition.
(2) The man in the orange coat is in the middle of the lower right third of the image, suggestive of a 'rule of thirds' concept which so often just 'works' in an image.
(3) The stark contrast between the tall tress and the small figure is enhanced by desaturating the trees, thus increasing the prominance of the small figure, ensuring it is not just a part of a bunch of competing colors.