Answer:
D
Step-by-step explanation:
I'm not completely sure, but I'm pretty positive that the answer would be D. The author definitely isn't saying that nature has a monetary value, that wouldn't go with the poem at all. He also isn't talking about the sadness of summer fading to autumn, I don't think. C is just nonsensical as the author didn't even mention Versailles. The answer is D--nature's beauty is short lived, represented well by the reference to the garden of eden.
I apologize if this is wrong, I don't know the correct answer for sure. Hope it's right though! :)