Who painted a series of artworks on the subject of water lines

What happens when there is a transfer of artwork using a grid? a. acts to verify the analysis of the composition b. the viewer's eye adjust to unity c. unify the composition d. none of the above

Match the instrument with its classification group: trumpet idiophone piano chordophone cowbell membranophone snare drum aerophone

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)