Depth of FIeld

This photo has a shallow depth of field

This photo has a medium depth of field

This photo had a deep depth of field

Creative Devices

This photo has a pop of color with a mostly monochromatic scene.

This photo contains selective focus. The stem and the grass below the flower is out of focus while the flower is in focus.

This photo contains linear perspective. 

Color

This photo contains saturated colors, represented by the red. It contains the complementary colors of green and red.