Hi. First, you have used the wrong spelling of, "which". A witch is a character ;)
Okay, back to your question. One example of a flashback in the story, "Borders" is when the mom talks about driving to Salt Lake City to visit her daughter.
If you read the story, you might find some other examples. Hope this helps.
Take care,
Diana
I'm going to guess Boo Radley.
1A
2 would go with something else, not any of these
3B
4D
5 would go with something else, not any of these