<span>Foreshortening and overlapping are techniques used for creating the sense of a 3 dimensional object within a 2 dimensional space.
</span>There is also the use of lighting, shading ,etc. but for the most part. In their essence, foreshadowing and overlapping are used to show depth.
In art, a medium is the material that artists use to create their art. It's that simple. Whatever a piece of art is made out of is its medium. The plural of medium is media.
Answer:
picture everyone in their underwear