From when I researched it, I found that he (he being Largo) observed the gestures between them because he believes that Desdemona had an affair, and needs to convince Cassio of it. I hope this helps! ~Mia
Personification - "the kiss of his memory" memory has been given a human quality kiss, even though it cannot do this.
B. They connect you with people you already know and like
To explain why armed forces are in Iraq.
-Gregory