A

#1

Digital Noise

using high ISOs and long exposure times will result in this undesirable effect on a digital camera.

B

#4

Underexposed

a picture is underexposed when it is does not receive enough light, or light for too little of time.

C

#2

Rule of Thirds

a picture contains a strong rule of thirds when subjects/horizons are in the lower, upper, left, or right third of the picture, away from the center.

D

#3

Shallow Depth of Field

a shallow depth of field is where a small amount of the depth of the picture is in focus.  A large or deep depth of field is where a substantial amount of the depth of the picture is in focus.