Explain the implications and importance of the dematerialized object in postwar American art. How did representational art gain importance in later years (particularly after 1980) and explain new forms introduced by artists.

The answer is

Relief sculpture - images are set against a flat background. a coin is a good example: the inscription, the date, and the figure are slightly raised above a flat surface. the ancient egyptians sometimes carved figures into a flat surface.    pro: they take significantly less time to make and do not require as much tools or skills as free-standingcons: not nearly as realistic, as it is not fully 3-d, and does not have the details that a free-standing one does.freestanding sculptures (also called  carved in the round) are not attached to any  background.  they are 3-dimensional  and fully rendered.

It has been trivialized in ads and cartoons.

B.paranormal activity is the answer