What is the refrain of "The Raven"

How many lines in the following stanza:

And the Raven, never flitting, still is sitting,still is sitting

On the pallid bust of Pallas just above my chamber door

And his eyes have all the seeming of a demon's that is dreaming

And the lamplight o'er him streaming throws his shadow on the floor;

And my soul from out the shadow that lies floating on the floor

Shall be lifted- nevermore!

And the silken, sad, uncertain rustling of each purple curtain

Thrilled me—filled me with fantastic terrors never felt before;

So that now, to still the beating of my heart, I stood repeating

“’Tis some visitor entreating entrance at my chamber door—

Some late visitor entreating entrance at my chamber door;—

            This it is and nothing more.”What is the rhyme scheme?

Which of the lines contains internal rhyme?

Deep into that darkness peering, long I stood there wondering, fearing,

Doubting, dreaming dreams no mortal ever dared to dream before;

But the silence was unbroken, and the stillness gave no token,

And the only word there spoken was the whispered word, “Lenore?”

This I whispered, and an echo murmured back the word, “Lenore!”—

            Merely this and nothing more.

Which lines contain repetition?

Back into the chamber turning, all my soul within me burning,

Soon again I heard a tapping somewhat louder than before.

“Surely,” said I, “surely that is something at my window lattice;

      Let me see, then, what thereat is, and this mystery explore—

Let my heart be still a moment and this mystery explore;—

            ’Tis the wind and nothing more!”

What is mood?

The attitude the speaker/narrator has towards a topic

The author alludes to "Night's Plutonian Shore". What is an allusion?

When the Raven is given the ability to talk, this is an example of?

Which is not part of the setting of "The Raven"?

What is significant about the bust of Pallas?

Who whispered the question, "Lenore?" in the hallway?

Edgar Allen Poe is the