We stopped before a summery display window at Macy’s, The World’s Largest Department Store,
to admire a family outfitted for the beach:
the handsome father, slim and sure of himself,

Based on the context of the poem, the family in the display window at Macy's symbolizes .

the Trujillo regime
the ideal American family
the speaker's family back in the Dominican Republic
the commercialism in America

most likely the answer would be a.) cupidity

definitions:

cupidity - greed for money or possessions

hydrophobia - extreme or irrational fear of water, especially as a symptom of rabies in humans

pathology - the science of the causes and effects of diseases, especially the branch of medicine that deals with the laboratory examination of samples of body tissue for diagnostic or forensic

patho -   relating to disease

what book are we talking about here