Muir uses diction that produces a mood of dread and direness. The words in bold, difficult, difficult, crooked, force, struggling, fallen, tangled, fear, hungry and faint, all meet up to influence you into thinking that the author is at peril. The images are clear-cut so then you are able to make perceivable images of the story in your head. Diction can help make a mood which can help unite everything else.