What word does the raven always use to answer the narrator’s questions? Why?“Open here I flung the shutter, when, with many a flirt and flutter, In there stepped a stately Raven of the saintly days of yore;
Not the least obeisance made he; not a minute stopped or stayed he;
But, with mien of lord or lady, perched above my chamber door—
Perched upon a bust of Pallas just above my chamber door—
Perched, and sat, and nothing more.”