To create a better image in the reader's mind. The use of imagery creates a better picture when the reader imagines the setting. Since when reading everyone thinks of a different picture imagery helps to create a picture closer to what the author imagined.
The climax of the passage is expressed in answer B
Answer:
A. They show that Nora goes from playing happily with her children to being startled by Krogstad, an unwelcome visitor.
Explanation:
Nora was playing happily with the children, but later on, she was seen crying. Then, A visitor appears and she becomes startled, for the visitor must have seen her crying.