How does Kristi Collier use imagery in Throwing Stones?

Imagery:

"In the next month before school started I'd have to spend all of my time in those fields, raking in the last cuttings of hay and shucking bushel upon bushel of corn. I hoped that this year it would be worth it"

Ham was asleep, slumped against the legendary Cleopatra, a robed, heavily made-up middle-aged woman with a thick waist and dark hairs bristling from her chin.

Out of the gloom emerged the shape of a large, dark horse with a night-robed figure seated atop. But the recognition that one half of the ghostly figure was a horse didn't slow my beating heart. I noticed that Bennie stepped to the left as the horse moved closer.