Images are often not appealing to reason, but to emotions. This is not to say that a lot of thought does not go into graphical expression, but that the images are all ways aimed at moving the viewer visually. For example a form of visual theatre, burlesque will often attack something by representing it so as to look inane. In this case there is an interpreting process going on, but the audience must necessarily have an emotional response to what they see. Expression through images may have some interpreting process that the audience must make, but the final appeal will rely on our emotions. Another good example is political cartoons. Because political cartoons are able to make some aspect of an event look inane, they appeal to the audiences emotions so that they will adopt a certain political view. In this it relies on the audiences reason to interpret the relationship and consequences represented in the cartoon, but the final result it aims for is a emotional response. But some photos will appeal only to are straight visceral response. For example, the photos asking for charity will usually feature children, which we will naturally feel pity for. In this case the photograph is appealing straight to our pity and natural sympathy towards children. In other cases the appeal may be anger. And beyond that this emotion is often manipulated through association. For example there are, in my opinion, a bit too many images portraying Obama aside Stalin, or other prominent figures in the USSR. This is not reason, but an attempt to stir up a visceral response of hatred and distrust.
2.Persuasion through language.
Language is our prime source of communication. We our so adept at communicating things through language that we may be able to change the meaning something has through the slightest change in words. This is because humans create connotations of words that can sometimes drift apart from people’s