Both are similar to each other. However, foreshadowing hints at the possible outcomes in the future without any interruption in the story and using events or dialogues of characters in the present time. Flash-forward, on the other hand, is an interjected scene that takes the story forward in time. Flash-forwards are bound to happen in the story because it is showing you the future of the story, but foreshadowing is just hinting and predicting future events, so they may or may not happen.
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Answer:
b.is the answer ...........
I believe the answer is C. Even though they can all be good.
It necessary that all individual conforms to a certain belief system in a utopian society because it is the starting point for the utopia, to believe in something greater than them and to trust in it to get to a new better world. If the people who belong to the Utopian society, start to believe in a different belief system individual, The utopia created at the beginning could disappear.