Which of the following is considered a method of disinfection?

Boiling water is recognized as a method of disinfection because it is capable of killing a wide range of pathogens, including bacteria, viruses, and some spores, by subjecting them to high temperatures. This process helps ensure that surfaces or tools used in esthetics are free from harmful microorganisms, which is crucial for maintaining a safe environment for clients.

In contrast, direct sunlight exposure can assist in reducing the levels of certain types of germs, but it may not be consistent or reliable for complete disinfection due to varying factors like intensity and duration of exposure. Mild soap and water are effective for cleaning but do not guarantee the elimination of all pathogens, which is required for true disinfection. Covering items with a cloth may help protect them from dust and debris but does not kill microbes or disinfect surfaces, making it an ineffective method for clinical disinfection.