It represents the moral and social decay that results from the uninhibited pursuit of wealth, as the rich indulge themselves with regard for nothing but their own pleasure. The valley of ashes also symbolizes the plight of the poor, like George Wilson, who live among the dirty ashes and lose their vitality as a result.
"swirling-surf" is simply a more accurate and detailed description of surf that occurs in the ocean. "Swirling" implies that the surf is especially large and rough.
Cut it down to the most important things. leave out any extra things that you don’t think are as important. just write down the MAIN ideas!