The correct answer is "Apostrophe, allusion".
The first three lines in Amy Lowell's poem "The Taxi", read as follows:
"When I go away from you
The world beats dead
Like a slackened drum"
In poetry, Apostrophe <u>refers to a literary device in which the narrator adresses an absent figure</u>. In this case, the poet is speaking of <u>a certain person that seems to be elusive in her life</u>, which brings a great deal of grief upon her.
On the other hand, an Allusion is composed as <u>an indirect reference that is lacking in detail and feels vague</u>. These usually present themselves when the narrator is recalling a past event or figure that we have no information about. In the beginning of this poem, <u>the author introduces her longing for a specific person that we don't know</u>, displaying a clear case of Allusion.
Hope this helps!