Figurative language: uses different figures of speech such as hyperbole, simile, onomatopoeia, metaphor among others.
In this sentence: The writer uses a metaphor and imagery . The horse represents courage, vitality, control. The color white, purity, trust. Flood, fill out beyond limits
Imagery: Flood, youth, dreams, poetry, white
Genocide is the murder of 100's or thousand's of people. The holocaust could be considered mass genocide of the Jews.
Hope that helps :)
Word Choice. Hope this helps!