Rock is a more carefree style than rock and roll.

What did Pablo Picasso introduce in paintings such as Guitar, Sheet Music, and Wine Glass that redefined painting as a space where art and reality, and the forces of high and low, engage with each other? What did this painting style come to be called?

What will be an ideal response?

Which of the following refers to the emphasis achieved by the scaling of sizes or shapes?

A. balance B. proportion C. gradation D. unity