When Morrison named the Hoover's vacuum cleaner, it showed the difference between what was traditional to him about all vacuum cleaners and what he now sees in the affluent household.
Explanation:
Hoover's vacuum cleaner was commercially dominant at the time and common among most households. Morrison knew the vacuum cleaner to work by heating. However, that was not the case with what he now sees in the house where he is to work.
This shows the difference in social classes as the rich household used more advanced technologies.
Because as it said in the previous question it said that "a thick dust covered survivors and first responders at ground Zero" If you look at the other questions they do not support the answer u have in the previous question I hope this helps and i am sorry if i a wrong but this is what I think