How does the author use imagery in the novel, When Two Feathers Fell From the Sky?

Example of Imagery:

"Its trunk was hollow, and its top had been sawed off long before Two had arrived, maybe before she was born. The tree had survived by the luck of a limb sending down a smaller bough that grew into the ground and became a new second trunk. It fed the damaged old tree and formed, with the mother limb, a bridge with the original trunk" (14).