Texture
the visual and tactile quality of a surface.

Form
the shape and physical appearance of something in three dimensions.

Line
a straight line leading to something inside of a photo.

Color
when an object produces different sensations on the eye and as a result light is emitted or reflected onto the eye.

Value
a combination of a camera's shutter speed and f-number.

Shape
a two dimensional element used in photos, similar to form.

Space
a given amount of room for the viewer of the photo to look into.

Repetition
when a photo repeats a certain piece in it more than once.

Balance
symmetry in a photo in all forms.

Emphasis
when a photo highlights a key point in the photo for the viewer to see.

Movement
during the photo, a certain person or object is shown changing their position.

Pattern
similar to repetition, man-made pieces that create a rhythm in the photo.

Proportion
when harmony is shown in a photo and points to the key feature.

Rhythm
when a photo repeats a piece that compliments the photo and expresses the photo.

Unity
when a photographer takes certain pieces of a photo and unifies them to create a beautiful piece.

Variety
having diversity in your photos.