I'm assuming you mean tropes, and it's because the original story tellers used three, leading to story tellers after that to copy them and use the rule of three, and so it just became a normal thing.
Answer: Hydrocephalus is a condition in which there is an overproduction or lack of absorption of the cerebral spinal fluid (CSF) that is found inside of the ventricles (fluid-filled areas) inside of the brain.
Explanation: IF- you are talking about, Arnold Chiari
In the month of October, I feel like...
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Trash
People are not aware of the danger coming ahead when they trust people they do not know well. Death comes as a surprise to these characters who cannot escape their fate.They are condemned from the moment they fall in the hands of these monsters who present themselves as benefactors but they are not kind or gentle. Billy had no clue he could be killed by the landlaldy as she disguised her true intentions very well.In stories like this the victimizer does not reveal himself or herself until the very end which makes it impossible for their prey to foreshadow their fate.