The document discusses why letter writing can elicit emotion. It notes that letters engage multiple senses like touch and sight through the physical act of writing. The psychology of letter writing is also explored, as one study found that having more time to write a letter allows for deeper reflection and more emotion. Common literary elements in letters, like repetition and exaggeration, help recreate the feeling of conversation. Additionally, the standard format of letters with salutations and closings promotes a respectful tone that has made letters an effective means of communication and protest throughout history.