A variable refers to a specific factor that has a range of possible values.
Explanation:
If you say the theme of the story article or whatever you're reading is "love" for say, you won't be able to say anything substantial about it. You need to be specific, and this is best done in a sentence Example: "Forbidden love can have terrible consequences"
Hope this helped you :)
C. Allusion because she is referring back to Greek mythology
Topic sentence? I don't really understand the question
