Depth of Field (shallow and wide)
Light (angle and intensity) - Angle is about where the light is coming from. Intensity - is a how bright the light is
Shadows
Diffusion - Decreasing the intensity of the light
Exposure
Aperture (f-stop) - Inside the lens and how big the opening is
Shutter Speed - has to do w/ the mirror that's inside the camera. And how fast the mirror opens and closes
ISO - Has to do w/ the sensor inside the camera is about how sensitive the sensor is to light