Which of these advances caused the fireplace to become the central feature of kitchens? Evolution of Culinary Techniques Cooking
on an open fire was the earliest culinary technique. Boiling, which evolved as the next technique for cooking food, led to the design of customized utensils. People in early settlements, such as the Egyptians, used small vessels (cauldrons). They hung these vessels over a fire to absorb and concentrate heat for cooking. The Egyptians also invented sealable storage silos to preserve surplus grains for many years. Native Americans used clay vessels for cooking and storing foods. They used these vessels long before European settlers arrived with pots and kettles. Stone cooking pots, used for cooking maize, evolved about 7000 BC in Central America. The pots were so heavy that they were often left permanently in the center of the cooking space.
The correct answer is for all clinical trials. NIH refers to the National Institute of Health which requires every researcher to describe data and safety monitoring when it comes to all clinical trials. Clinical trials refer to experiments conducted within clinical research.
