So that the audience isn’t confused on the authors purpose. With a smaller area it leaves not much confusion and allows the reader to know what he/her is reading.
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Definition of Altruism ;
is the belief that the well-being of others is equally, if not more, important than the well-being or survival of the self. Further, altruism involves selfless acts or undertakings that put the welfare of others before one's own.
An example of altruism in a sentence would be , Politicians are not necessarily motivated by pure altruism.
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A. It helps reveal the characters’ thoughts and feelings.