That is a really gud topic you've chosen.. :) here is your speech.. :

mystery is something that is impossible or difficult to understand. It is one of the best emotions that writers choose to write about. mystery is present in everything and man is curious to solve mysteries. that is what makes it an interesting genre for writers of all sorts.  A lot of things always remains a mystery from an assassination of a famous person to the existence of  dragons in the past.

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