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Final answer:Conventions in language include grammar, spelling, and punctuation. All of these are important for effective communication.Explanation:Conventionsin the context of language refer to the standard rules and norms that govern the use of grammar, spelling, and punctuation.Propergrammarinvolves using the correct structure, tense, and syntax in sentences.Correctspellingensures that words are written accurately and according to commonly accepted spellings.Appropriatepunctuationinvolves using marks such as commas, periods, and question marks to clarify sentence structure and meaning.Therefore, the correct answer isd. All of these, as conventions encompass proper grammar, correct spelling, and appropriate punctuation.Learn more about Language conventions here:brainly.com/question/33709664...