Pound was influenced here by the Japanese haiku form, which utilises images from nature to connect the momentary with the timeless, the miniature with the transcendent. The idea of people's faces being like 'petals' suggests their fragility and the brevity of life
nat-geo
Try common ratio, because b represents a constant variable. (I’m not 100% but it may be this)
The correct answer is D: model the behavior whenever appropriate.