What is the term for the physical material that provides a base for and sustains a painting?

Which of the following is NOT included in the decorative program of the Dome of the Rock in Jerusalem?

A. mosaics depicting symmetrical vine scrolls and trees B. inscriptions about the building C. an ambulatory D. a mihrab

Which of the following author's wrote Walden, or Life in the Woods?

A. Walt Whitman B. Johann Wolfgang von Goethe C. Ralph Waldo Emerson D. Henry David Thoreau