Love how the picture is captured. The shape of the rug, how it is rolled up really puts the photo together.
Here, there is a very obvious circle shape.
The subject clearly makes a circle and it is made even more prominent with the use of some dramatic lighting. Nice picture!
I love how you captured this in black and white, it really draws the eye to the circles represented in the rug.
This photo is cool all around and obviously has an circle in it.
The concept of shape is clear in this picture.
I see the rug stand out from its surroundings because of a defined or implied boundary.