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When we say verbal, this is a word that is formed from a verb, but it does not function as a verb, but rather, as a different part of speech. An example of this would be a gerund. Therefore, the answer for the given question above is option C. The function of a verbal is to <span> act as another part of speech. Hope this answer helps.</span>
The authors purpose was to, put in basic form ; inform the reader about malaria, to give insite.