The two text structures that would best fit an essay focusing on historical figures and their actions to address safety concerns in the food industry are:
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Sequential - This structure would allow you to outline the timeline of events and actions taken by historical figures to improve food safety over time, presenting them in the order in which they occurred.
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Problem and solution - This structure would enable you to identify various safety concerns in the food industry as problems and then discuss the specific actions taken by historical figures as solutions to those problems.
These structures effectively convey the narrative of how food safety has evolved through targeted actions over time.