Celina, in order to correct her essay, should utilize a thesaurus to expand her vocabulary and prevent the repetition of words. This valuable resource will provide her with synonyms for the words she frequently used, allowing her to express herself more diversely. Mike, on the other hand, would benefit from using a grammar guide or dictionary to rectify his essay. These invaluable tools will assist him in selecting the correct part of speech for the words he wishes to incorporate, thereby enhancing the accuracy of his vocabulary usage. For Toni, using a dictionary to revise her essay would be advantageous. By consulting definitions, she can ensure that the words she employed align with her intended meaning and, if necessary, select more suitable alternatives. summarize this

In summary, Celina should use a thesaurus to expand her vocabulary and avoid repetitive words, Mike should utilize a grammar guide or dictionary to improve the accuracy of his vocabulary usage, and Toni can benefit from using a dictionary to ensure her word choices align with her intended meaning and choose more suitable alternatives if needed.