Question

does the author’s use of free verse allow him to effectively express his feelings about the memorial in the poem ...?
the use of free verse allows him to use personification.
the use of free verse allows him to use a traditional rhyme scheme.
the use of free verse allows him to use similes and metaphors.
the use of free verse allows him to use unconventional rhythm.

Explanation:

Free verse is defined by the absence of fixed meter or traditional rhyme schemes, which allows for natural, unconventional rhythm matching the author’s emotional tone. Personification, similes/metaphors are literary devices not exclusive to free verse; traditional rhyme schemes contradict free verse’s nature. Thus, the only valid link is unconventional rhythm.

Answer:

The use of free verse allows him to use unconventional rhythm.