While in an airplane flying over the midwestern United States, your friend Amare looks out the window and sees what appear to be hills of earth
formed in the shape of animals. Amare cannot believe eyes. He asks you about these amazing, gigantic pleces of artwork. What would you
teach Amare about to help him understand what he is observing out the window?
A. effigy mounds
B. Nazca Lines
C. geoglyphs
D. hieroglyphs