Concept:Visual mode only means that the information is received by the sense of sight alone.
No sound or audio is involved in this mode of reception.
Explanation:Consider each source of information carefully.
Television presents both images and sound together.
Because it uses audio as well as visuals, television is not received in visual mode only.
Radio delivers information through sound only.
It is an audio source, so it cannot be described as visual.
A photograph is a still image.
When a user views a photograph, he or she receives the information only by looking at it.
A photograph has no sound attached to it, so it is purely visual.
A computer is a multimedia device.
It can display text, graphics, and video, and it can also play audio.
Because a computer uses both visual and audio modes, it is not visual only.
Therefore, the source that is received by the user in visual mode only is the photograph.
Answer:C. Photograph