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
None of the above! You can use the headlights even if the visibility is way under 1000feet. There are many countries especially in Europe where headlights/daylights must be always on with no regard to visibility conditions. In some cities you will be even given a fine for not having the lights on all the time. But rules vary from country to country...
