Which of the following best describes cleaning?

The definition of cleaning primarily involves the removal of dirt, debris, and organic matter through a mechanical process. This is typically achieved by using soap and water, which helps to lift and wash away unwanted substances from surfaces. By focusing on this aspect, option B accurately captures the essence of cleaning, emphasizing the importance of the physical action and the use of basic cleaning agents, rather than relying solely on chemical reactions as described in the other options.

In contrast, disinfecting (as mentioned in option A) involves the use of chemicals to kill bacteria and viruses on surfaces but does not necessarily remove dirt. Additionally, option C describes sterilization, which goes beyond cleaning to eliminate all forms of microbial life, including spores, rather than just dirty surfaces. Option D pertains to sanitization, a process which aims to lower the number of germs to a safe level but again does not encompass the broader definition of cleaning as focused on mechanical removal of dirt. Hence, option B stands out as the most accurate description of cleaning.