Why did braque and picasso begin pasting paper, fabric, rope, and other objects to their canvases?

What are 3 different parts of the sonata form

Anarrative piece of are ? a. tells a story or series of event b. serves as a remembrance of an event person c. display the likeness of a person, in order to document their existence d. relates the lives of important individuals

In "thirty are better than one" 1963 by andy warhol describe to what degree this image depicts rhythm or pattern