Singular noun is a noun that assigns to one thing, one person and one idea. Example: Boy, Girl, Father, Mother, Man, Doctor and so on.
<span>Muir's use of diction creates a mood of urgency and fear. The highlighted words - difficult, difficult, force, crooked, struggling, tangled, fallen, fear, faint and hungry - come together to make you feel that the author is in danger. The imagery is clear so that it comes alive in your mind. Diction can help create a mood which can help bring everything else together.
Hope this helps.</span>
Question #1 : Letter A.
Question #2 : Letter B.
Question #3 : Letter A.
Question #4 : I'm not really sure, but I think the best answer would be Letter C.
I hope this helps you !