1: Contrast, one side is dark while the other is light

2: Shape, there is a clear square

3: Pattern and texture, the dots/lines are clear

4: Pattern and line, there is dark and light, and they are alternating

5: Line, there is 2 lines that are emphasized

6: Shape, there is a clear circle

7: Shape and line, there are clear defining lines, and there are squares

8: Pattern and shape, there is a pattern of circles

9: Line, shape and pattern, there are clear lines that create quares

10: Contrast and line, the lines define a clear dark or light part

11: Contrast and shape, there is a clear trapezoid

12: Line and texture, you can see the grooves, and they are all horizontal

Down below, I think that photos 5-11 all turned out very well, because I applied filters and made them look very interesting. The other photos also captured the drawings, just that they dont have decoration and are a bit standard.