Pictures are great, but sometimes words or narration can greatly enhance the meaning of pictures. Consider the humorous parody of anti drug campaigns... Another example is the picture Lena S. did for the "Buy Nothing Day" Assignment:
Now consider this series from the New York Times called "One in a Million" that features voice narration. While the pictures themselves are strong, the voice narration gives us the feeling of being in the room with the subjects....evidence that we live in a time when the merging of technologies makes life and visual communication more interesting.