What is the primary function of a thermometer in food safety?

The primary function of a thermometer in food safety is to accurately measure the internal temperature of food. This is crucial because many foodborne illnesses are caused by the growth of harmful bacteria, which can thrive at certain temperatures. By using a thermometer, food managers can ensure that food is cooked to the appropriate temperature to eliminate pathogens and maintain food safety standards. This practice helps in verifying that food has been heated or cooled sufficiently to prevent the growth of microorganisms, thereby protecting public health.

Other options do not fulfill this critical role in food safety. Decorating kitchen equipment does not contribute to food safety, as aesthetics do not influence the safe preparation or handling of food. Testing the color of food is not a reliable method for determining doneness or safety, as color can be misleading. Measuring humidity in the kitchen does not directly relate to the safety of food temperatures, although managing humidity is part of general kitchen practices; it does not ensure that food is cooked or stored at safe temperatures.