True or false without contrasting values in light, we would not see in three dimensions

Hello darlings! could anyone explain to me what exactly this means? i can't understand exactly what my school is asking of me oof i've read the lesson over and over and i'm still confused. create your own nontraditional artwork. you might choose installation art, environmental art, or use an unconventional medium.

To make an etching the artist first coats the entire printing plate with an acid-resistant substance called a made from beeswax, asphalt, and other material. the artist then draws on the coated plate with an etching needle exposing the metal. next the plate is dipped in the plate is removed, the waxy coating removed, and the plate is cleaned, inked and printed.

Sound waves can travel only in the aira. trueb.false