The correct answer is; Fragment.
Further Explanation:
This is a sentence fragment. A full completed sentence with this wording would be "If your parents think today's fashions are weird they should see the clothes people wore in the middle ages."
This is not a complete sentence, when a sentence is fragmented it has disconnected from the main clause. The best way to fix a fragment is to remove the period from the two sentences if they are together.
Other types of punctuation are allowed for sentence fragments such as commas.
Learn more about sentence fragments at https://brainly.com/question/3365986
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