Which phrase most contributes to this passage's sad and isolated tone?

i will never forget that lonesome hill of stone that is her final bed, as it fades from my sight. i tread softly by my uncle, my hand in his. i walk with my head turned, watching that small hill as it fades from my sight. the soldiers make us continue walking. my uncle talks to me, trying to comfort me. i walk in loneliness."

a. "my uncle talks to me" b. "fades from my sight" c. trying to comfort me" d. walk with my head turned"