Read the poem entitled "Nothing Gold Can Stay" by Robert Frost.Nature's first green is gold,Her hardest hue to hold.Her early leaf's a flower;But only so an hour.Then leaf subsides to leaf.So Eden sank to grief,So dawn goes down to day.Nothing gold can stay.

The poem describes how nature’s earliest beauty is brief: green leaves fade, Eden falls, and dawn turns into day. These examples show that beautiful or perfect moments inevitably change and pass. Therefore, the central idea is the inevitability of change, choice D.

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