Final answer:
Cleaning is the process of removing dirt, dust, stains, and other contaminants from surfaces. It is achieved by using cleaning agents that can remove dirt and clean at the same time.
Step-by-step explanation:
Cleaning is the process of removing dirt, dust, stains, and other contaminants from surfaces. It is often achieved by using cleaning agents or hard-surface cleaners, which are substances that can remove dirt and clean at the same time. For example, all-purpose cleansers are effective in removing most common kinds of dirt and are safe to use on most surfaces.