Final answer:
The Egyptians invented a useful advance in the culinary arts by developing methods of food preservation using salt and natural drying techniques, allowing them to store food for long periods of time.
Step-by-step explanation:
A useful advance in the culinary arts that the Egyptians invented is the method of food preservation using salt and natural drying techniques. They used this method to store food for many years, especially during times of drought or famine. The Egyptians recognized the importance of preserving food for future use, and their techniques laid the foundation for modern food preservation methods.
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