Answer:
The figurative language used in the stanza is: alliteration.
Step-by-step explanation:
Alliteration is a literary device that repeats consonant sounds at the beginning of words that are close to each other in a structure. A simple example would be a well-known tongue twister: She sells seashells by the seashore (the /s/ sound is repeated).
In the stanza we are analyzing here, alliteration takes place when the author repeats the sound represented by the letter "h":
In the silence he has heard
We have three words in a row beginning with the same consonant sound. Thus, we have an alliteration.
The stanza is an excerpt from the poem "The D.um.b Soldier," by Robert Louis Stevenson.