I find this photo by Rayven interesting because of the background being mainly dark and the subject being the main source of direct light with a high amount of contrast. It brings a very strong focal point to the flower rather than anything else. It brings an organic feel to it with the sight of warm colors. Also the lights that go around the container lead the eye up to the pedals of the flower. A strong example of leading lines.
I find this photo by Mehdi interesting because of the angle of view that this was shot in. Combining this with the double yellow lines gives the impression that they are leading to a vanishing point. they can also be considered as converging leading lines. I also do like the strong reflection coming off of the second building on the left hand side. It almost looks like a giant mirror.