Final answer:
The use of the words 'battle', 'bloodshed', and 'brood' demonstrates the literary device known as alliteration, which is used to add rhythm and emphasis in literature.
Step-by-step explanation:
The literary device exemplified by the use of the words battle, bloodshed, and brood is alliteration. Alliteration is a literary device where consecutive words in a phrase or line of poetry begin with the same consonant sound. This device is often used to add rhythm, musicality, and emphasis in both poetry and prose. In literature, literary devices are techniques that writers use to convey their message more powerfully or to enhance their writing. Examples of other common literary devices include metaphor, simile, personification, and imagery. Genre refers to the type or style of literature, and each genre may employ different literary devices to achieve its purpose.