The correct suffix to "phon" meaning "having characteristics of sound" would be "-ic". This makes the word "phonic"; which literally translates into the relation of sounds spoken.
The sentences that use rhetorical devices are:
C) Outside, the torrential rain poured like a waterfall
E) Saving the orangutans is a Herculean task for conservationists.
The first sentence uses simile, and the second one a metaphor/allusion.
It would be letter C - hopeful.
The introduction of the boy advances the plot of Daly's "Sixteen" by making the narrator feel hopeful. This was when the young male skater made the narrator feel joyful and hopeful for days. Although in the end, the narrator realized that he will never call her at all.