1.) C
2.) B
3.) I would assume A, as it goes with the answer to question 2.
C. Characterization.
"Characterization is a literary device that is used step-by-step in literature to highlight and explain the details about a character in a story. It is in the initial stage in which the writer introduces the character with noticeable emergence. After introducing the character, the writer often talks about his behavior; then, as the story progresses, the thought-processes of the character."
The answer in my opinion is A. It would really show how big the Great Wall of China is and prove it is one of the largest building projects.
Hope this helped ☺️
