What is the main difference between main idea and theme?

there isn't a difference

theme is the universal message and main idea is the plot.

the theme is the plot and the message is the main idea.

Why would victor frankenstein rather than his creation most likely be considered a monstrous? a. because he uses ancient curses and spells to give his creation life b. because he seeks only the company of professors and not his friends c. because he wishes to be a famous scientist d. because he is obsessed with creating a living being

Which literary device has emily dickinson used in these lines? how dreary to be somebody! how public, like a frog to tell your name the livelong day to an admiring bog! metaphor alliteration simile allusion

Dream variations by langston hughes analysisand “the tropics in new york” by claude mckay both depict a longing for another place. what are the places and what do they represent?