In this picture we can see the sharpness of the whole photo, everything is clear and in focus. We can see everything from the curves of Sol's body to the darkness of the shadows.
In this photo Sol is blurred out and the background is in focus. The light at the end of the tunnel is the new focus, and is the only thing you can clearly see.
In this photo Sol is in focus and the background is blurred out. You can still see the sharpness of Sol's body, but not of the background.
