I like this photos composition because of the line element that is created using the train track and also like the dominant colors being used (green and brown). I also like the use of proportion in this photo.
Diagonal perspective- Finding an existing line and using it.
Depth of Field Narrow-Controlled with aperture,blur out background,limited background so subject is not lost
This selective focus picture focuses on the railroads. We can see the railroads are going straight, but we don't know where it leads to.