What is the name of the call and response texture used in the sacred harp style?

Explain why director Martin Scorsese often complicates his shooting schedule by using traveling shots – as he does in the film Gangs of New York – instead of simply cutting from one shot to the next

What will be an ideal response?

Brian De Palma's Blow Out and Francis Ford Coppola's The Conversation are similar in that

A. sound itself is an important plot device. B. ambient sounds are almost nonexistent. C. sound itself contributes to the atmosphere of the film as a period piece. D. voice-over narration is an important element in conveying atmosphere and texture as well as background information.