I think your correct for all of those answers.
“And you want to play basketball?” His Father’s brows knitted over deep-brown eyes. “That must be some kind of a joke. Now you just get into your room and hit these books.”
The sentence that best describes the symbolic meaning of gold in the poem is The wonderful things in life that do not last.
This poem uses a very important parallel where it shows the word Gold as a precious or perfect thing in this line "Nothing gold can stay". We have another example that talks about how things that we appreciate in life are not eternal and we have to live them when they are happening in the line "Nature's first green is gold".
The other options are not possible because the poem has a constant element of transition from one thing to another which represents temporal things.
Answer:
If never ending such as birth of new organisms is described as beauty, you could say its lasting since it happens infinity. Birth of things could also be described as fleeting if say the organism giving birth has left its mark on the planet before death.
Explanation:
The question is asking for an explanation so I just put everything as the answer.
Hope this helps.