In the eighteenth century, what differentiated the everyday lives of the elite and the lower case

What is the name of the song released by the artist "owl city" in 2009 as a hit single? (it was also one of the dankest memes of 2017)

In which u.s. state would you find a full-size replica of the the parthenon?

Name the note a) a b) e c) g d) d