Personification: Describing an object/animal as if they possess human traits/are humans.
Answer: D
D describes the clouds as "crying in sorrow". In reality, only humans can cry in sorrow, so the clouds are personified.
The answer is B.
Tone is described as an overall feeling or attitude of a piece of writing. The feeling of isolation is repeated throughout the excerpt when it starts with the "lonesome hill" and is continued with "I walk in loneliness". Therefore your answer is that the passage has an isolated and sad tone.