Explanation it can also slow down photosynthesis. ... These mechanisms can shut photosynthesis down if sugaraccumulation is too high.
Answer would be: Direct definitions
C. His conceited declaration that he is "a pretty piece of flesh"
i would chose A. It captures the feeling that beauty in nature is fleeting.
I believe it's A. but this is the first time I've seen someone use harrisburg in a question and I was happy