Why a Pen is a Pen-According to Aristotle

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…Final Cause, this Cause deals with the purpose of a substance. The Final Cause of the pen is to be used for writing. These four causes along with the Ontological moments of a substance help lead to the conclusion that the pen in your hand is a pen. In conclusion the pen in your hand is a pen because it contains matter and form along with the essential causes that lead to its final purpose.