Answer:
Humans belong in the chordata phylum because they meet on the criteria listed on the chart (multicellular, tissues, vertebrae). Each requirement for each phylum also applies to the categories on the right. Because humans are one of the most complex life forms, it only makes sense that we're in the most complex phylum.
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
Chameleons change their skin color to hide in their surrounding adaptation
