
"Sitting on Rail" is arranged so the viewers are positioned behind the boys and the rail. The vectors of attention are away from us, pointed out into the gray skies and the water. This makes the viewer feel not as if they are involved in the picture but that they are observing the picture. The kids faces are not interacting with the audience, you cannot see them at all. I think this appeal to logos, having the vectors of attention pointed away, makes an argument that we viewers cannot be involved in the picture because we cannot imagine what those kids are going through in Rwanda. Viewing the boys slumped over on the railing, looking to the gray sky, is a strong appeal to pathos. It makes the viewers feel sympathetic toward those boys. We are looking on because we cannot possibly understand, but that leaves us to feel sympathetic.
He took the picture at an angle that makes the railing and sky look as if they must go on forever. The focus is on the sky, due to the vectors of attention as stated above. These both could be appeals to ethos. If the gray sky is a symbol of the hard times they are going through in this child's life, he could view it with no end in sight. So, he took the picture to match his feelings, that the gray sky could go on forever. He cropped it to include a variety of boys, similarly having to go through the difficulties he is.
The lighting is about half way between light and dark. It is light enough that the viewers can see everything, but the sky is the only thing light enough to see really clearly. Where the boys are standing is a bit darker, not as easy to clearly see them, their clothing, or the objects they have with them. Taking this picture in this lighting, could be an appeal to logos, putting the focus more on the sky. It is the most lit thing in the picture.
The coloration adds to the overall appeal to pathos in this photograph. Their clothing are hues of tan, green, and red. Although they are highly saturated, the are not bright. The green and red hues are dark colors. It draws on that sympathetic emotion because it keeps with the dreary mood. Because their faces are pointed away, their clothes is what makes them unique from one to another. Yet, they are all dark colors that bring about sad or bored moods. On top of the coloration in their clothing the surrounding area is also made up of gray hues. Again, it is highly saturated, but do to the hue itself it is not vibrant. Gray is often characterized with sadness, or pain. The water could have been blue, or green, but it is also gray. Looking at this photo we get the feeling of sadness but because we are not involved in the photo, it is like the sadness belongs to the boys. That leaves the audience to feel sympathy.