Answer:
I believe it is the line "till bore an apple bright" becusse it link to the story of Adam and Eve with the forbidden apple tree and apple also links to a poison treee
I don't know if you still need this but it's D. "And it grew both day and night,".
Explanation:
Plants usually don't grow at night because there is no sun, so D. contains a biblical allusion.
What poem is it?
A simile example would be "crazy like a fox"
Its comparing one thing with another thing of a different kind.
no words are underlined
i think it's A.