Become is a example of a "linking verb." A linking verb is a verb that describes a object while connecting it to another noun or adjective. A example of a linking verb would be something like: The eggs smells rotten, or Jared has become a werewolf.
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Students learn better when they aren't hungry. Which leads to a healthier and more knowledgeable community (knowledge is power). When these students graduate they will be able to work and provide more, physically and mentally. Thus making the community as a whole more enriched and profitable.