If you're talking about main ideas as in "to inform, persuade, or others", then I would say, that the paragraph was written to inform the reader. It tells you about the history of werewolves and the myths commonly found in movies and books. Hope this helps.
Improved transportation and medicine were the two primary factors that increased European exploration and interests in interior Africa in the late 1800s.
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What is the moral of the passage? It is important to think clearly in dangerous situations. Leopards are afraid to come near fire. Older people are wiser than young people