Answer:
“Fairy-tale techniques remain little identified and appreciated.”
Explanation:
The passage starts with the intent of the writer which is to "demystify" the idea that "fairy tales are of use only to writers of fantasy or fabulism," but it's a vast topic, as there could be a variety of ways of doing that. Bernheimer further narrows this down to the techniques of fairy tales, "to celebrate their lucid form". She shifts the focus from the interpretation of fairy tales, which she says is "a well-travelled path," to the "form" or techniques of fairy tales.
In addition to being the central idea of this particular passage, it also continues to be the focus as the essay progresses, wherein Kate Bernheimer expounds the form or techniques of fairy tales. It is also evident from the title of the essay "Fairy Tale Is Form, Form Is Fairy Tale."
<u>All the ideas mentioned in the options revolve around and lead to the central idea of "fairy-tale techniques," which the author intends to elaborate on, as she mentions that they are "little identified and appreciated."</u>