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."michael rutledge, "samuel's memory"a. comfort meb. tread softlyc. continue walkingd. lonesome hill