Answer:
This form of poetry has five lines.
Explanation:
It is parrelism not karios
Answer:
The line 'So Eden sank to grief' is an allusion, or literary reference, to the Biblical story about The Garden of Eden, a perfect paradise until Eve ate from the Tree of Knowledge. By making this reference, Frost is implying that the idea nothing good can last is an old one; it's part of our human experience.
It may be differ from book to book, but it should be chapter 6, page 79.