(3) it facilitates convection currents Explanation: The freezer in a refrigerator is fitted near the top so that it can cool the whole interior by setting up convection currents. Most household freezers maintain temperatures from (-23 to -18 degree C), although some freezeronly units can achieve (-34 degree C), and lower. Refrigerators generally do not achieve lower than (-23 degree C), since the same coolant loop serves both compartments: Lowering the freezer compartment temperature excessively causes difficulties in maintaining above-reezing temperature in the refrigerator compartment.