The poem opens with a whimsical tone.
A person is said to be whimsical if they behave in a playful or fanciful way.
This is interesting because the opening sentences indirectly speak of the lethal effects of war and by those lines attempts to elicit the imagery of a post-war scenario in the mind of the reader albeit playfully, where phosphoric ashes fill the atmosphere as the aftermath of bombings.
The correct answer, therefore, is D.
A tone is an author's perceived attitude towards their audience or readers and characters. It relates to the methods via which the author communicates their attitude in a work of literature.
Tone controls the reader's response to the literature.
Other examples of tone in literature are:
See the link below for more about tones in literature.
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