Arepeated rhythmic pattern in which an accented beat is followed by two unaccented beats is

What is the term for a re-current musical section between various contrasting sections

Artists best achieve contrast in a composition by: a. drawing with realism b. shading a drawing with dark and light values c. using drawing techniques like stippling and hatching d. focusing on line and shape in a drawing

Which artist is often considered the leader of the hudson river school and poignantly set up contrast between the cultivated east and the wild west in the united states?