In Dulce et Decorum Est, hags is used to describe young soldiers. The simile 'coughing like hags' was used because the young soldiers went into battle strong and full of life. After battle, they returned looking aged and beat down - hence 'hags' or resembling beggars.
The correct answer is "The musical quality". Lyric poetry is a formal type of poetry which expresses personal emotions or feelings. Poetry can follow a strict structure or not, but many different types of poems use poetic devices. Many types of poetic devices can be used to create a powerful, memorable poem. Repetition is used to create rhythm. Repetition is repeating words, phrases, or lines. The term lyric was defined by its musical accompaniment.