I think Imagery appeals to sight because you're imagining it in your head, sound because if you hear something you can imagine what it looks like or what it is, touch because you can imagine in your head what it is, taste because if your eating something you could imagine what it is by the taste, and smell because if you smell something you can get an idea or picture in your mind what it is. Sorry if I'm wrong, but I think these are the best options.
