To get the correct sentence structure note that:
Text structures can vary as problem-solution, compare and contrast, description, chronological, etc.
Text structures are forms of text organization that can vary according to the intent of the writer. Also, sentence fragments are sentences whose subjects or verbs are not in place. These can be identified quite easily. If the writer states a problem and specifies its solution, that is the problem-solution structure.
But if the writing lists events as they happen in time, then that is a chronological structure. This explanation will help you arrive at the correct answers since the lines were not written here.
Learn more about text structures here:
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