How did picasso develop collage as an art form?

: During both periods of cubism experiments by Picasso and others resulted in several new techniques, including collage and papier collé

The region of the united states where beef and hog production is prevalent is the midwestthere are 12 states in this area including  illinois,  indiana,  iowa,  kansas,  michigan,  minnesota,  missouri,nebraska,  north dakota,  ohio,  south dakota, and  wisconsin. all of these states are known for their meat and such products. 

Rod zombie is better