The correct answer is A) to introduce the theme of wanting more.
The other options of the question were B) to suggest an image with vivid, strong verbs. C) to make a comparison using a smile. D) to create a descriptive language using a metaphor.
The author focuses so much on Alfonso’s appearance to introduce the theme of wanting more.
Gary Soto is the author of "Broken Chain," the book of where this excerpt was taken as reference. This part says that "Alfonso sat on the ´pr+orch trying to push his crooked teeth to where he thought they belonged. He hated the way he looked. Last week he did fifty sit-ups a day, thinking that he would burn those already apparent ripples on his stomach to even deeper ripples."