The above line is an example of Assonance.
Answer: Option A
Step-by-step explanation:
Literary devices are elements of a poem that increases the engagement of the audience to the context. In the question asked, the lines have two literary devices: alliteration and assonance. If there is a presence of alliteration in the poem, then the author repeats consonant sounds such as sound 'w' in 'weak and weary'.
If the author employs repetitive vowel sounds in the same line, then it is called assonance. The vowel sound 'e' repeats in dreary, weak and weary. Therefore, the answer is assonance.