Imagery
Addonizio uses imagery to describe the narrator's breath in "Breathe." The narrator is told to "watch her breath," which she doesn't understand because breath doesn't look like anything. In response, she thinks what a breath might look like, using imagery to describe it:
"First I imagine my tongue is a road, and my breath is wind whooshing down from some black space in the back of my head."
Here, the author uses imagery to compare it to an image she is familiar with. As such, this helps her to visualize her breath easier.
Description of Bethany
Bethany is described using angelic imagery, in order to emphasize her youth, innocence, and the unfairness of her death. For example, she is described as "falling off some glittery cloud to land in our bedroom, her long hair fanned out around her face."
Annabell's fish
In "Beautiful Lady of the Snow," the narrator describes the fish Annabell won from the county fair. They describe how "the other one leaves its little red and green castle to float up against the glass and watch." Later, they are described as "shiny gold." Ultimately, this focus on the fish is an indication of Annabell's love for animals.