Lighting:
Lighting can come from lots of direction for example from above, the side, under any direction.Its good to have lighting because it can change the picture up a lot. If the picture is dark you can make the picture more clear.
Camera angle:
A photo can be taken from eye level or above the object. Not squared or slanted. This makes the picture look different for other people. If it is at eye level a person might think it is looking at them.
Proximity:
The photo can be far,medium long,close up or really close. If the picture is far then they can see everything in the background. If it is a close up then people know just to look at the face and nothing else.

The three variables in this picture would be. The lighting is InSufficient light, for camera angle it is eye level and the proximity is medium long. The picture of Matt Ridgway make him look tough because he is stand in the dark and you have to be tough to stand in the dark by yourself.Also Matt Ridgway looks strong because he is holding a grenade and you have to be strong to be holding a grenade what if something goes wrong.The camera angle is at eye level because that makes him as equal to everyone in the world. The proximity is medium long because it's not to far or close. He's uniform makes him look he is professional and a special person.





