______ is commonly used to extinguish fires in rural houses; the simplest way to extinguish a fire in a frying pan is ______. These two methods of extinguishing fire are based on the following princi

______ is commonly used to extinguish fires in rural houses; the simplest way to extinguish a fire in a frying pan is ______. These two methods of extinguishing fire are based on the following principles:

Water is often used to extinguish fires in rural houses. Water evaporates and takes away heat, lowering the temperature of combustibles below the ignition point to achieve the purpose of extinguishing the fire. The easiest way to extinguish a fire when an oil pan catches fire is to cover it with a lid. Extinguish the fire by isolating air (or oxygen).

So the answer is: water; cover it with a lid; cut off air (or oxygen).