What is a main idea? How does one create a main idea?

Compare dee’s and her mother’s spoken language

Read the movie summary. two rival magicians compete for fame and success in edwardian london. when their bitter feud begins to escalate, they each resort to more and more dangerous tricks to try to outdo the other, ultimately placing the lives and sanity of those around them in jeopardy. based on this summary, the film is most likely a(n)

If the author of the gift of the magi had made the reader aware of the gifts that jim had purchased in the beginning of the story this would be an example of