The Upturned face tell a story of how two soldiers humorously argue about how to bury their comrade in the middle of the battle.
So, the tone of upturned face would be: somewhat humorous.
The mood would be: uneasy
The title's alliteration is picked up by Owen's use of repeated consonants. In the poem's last lines, he returns to the two divisive, abstract nouns, "Dulce" and "Decorum," which have the meanings "sweet" and "honorable."
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What is an Alliterative sound?</h3>
Alliteration refers to the continual repetition of consonants form the beginning of two or more words.
They are also called rhymes.
Learn more about Alliterative sounds at;
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The answer is pleasing to the ear
In literature, a subject is a topic of the particular work.
What you are writing about in your work, is the subject.