The answer is D. A haiku since it has 5,7,5 pattern.
Integral setting is when the action, character, or theme are influenced by the time and place, setting. Controlling setting controls characters. If you confine a character to a certain setting it defines the character. Characters, given these circumstances, in this time and place, behave in this way. I got this from some of my notes.
One tradition is to wear green!