. As is often said, knowledge is power, and power in the wrong hands can be dangerous. ... If you yourself are faced with an opportunity to gain knowledge and later apply it, you must decide whether the potential benefits are worth any harm that may be done as a result.
The only pronoun in this sentence is the word <em>they, </em>and it is a personal pronoun used to denote third person plural.
<span>Personification is the attribution of a personal nature or human characteristics to something nonhuman, or the representation of an abstract quality in human form.
Hope this helps :))
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The fourth answer because it is not to casual but not too formal at the same time
