Cheyenne's Line and repetition

This is a picture I took that is a crack in a rock wall. I thought it was creative because it is just a crack that
Looks like a line. It is also just randomly on a rock wall in the quad. The darkness in the crack, of positive space creates the line. 

I took this second picture and I thought this was a different and creative way of showing a line. It is a shadow of a roof of a building . And the shadow creates a line. It is not a object, that you can physically touch. But it is something you can see, through the photo with your vision. 

This is my third photo, and it is showing multiple lines. This is giving your eyes more than one thing to look at.
It is making the picture interesting, by adding the extra lines to it.