What techniques does this Renaissance painting by Antoine Carbon use to create depth?

Where does middle c get its name? a. it sits in them middle of the grand staff b. it sits in them middle of the treble clef c. it sits in them middle of the alto clef d. it sits in them middle of the bass clef

Atype of construction where tha main load bearing element are hung for suspension cables that are then suspended from vertical supports anchored into the ground or a riverbed

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)