Which of the following is a non-chemical method for cleaning nails?

Using a natural scrub like sugar mixed with oil is a non-chemical method for cleaning nails because it relies on physical exfoliation rather than chemical agents. The granular texture of the sugar helps to remove dead skin and impurities, while the oil provides moisture and nourishment to the skin and nails. This method promotes a gentle and natural approach to nail care without exposing the skin to potentially harsh chemicals commonly found in other cleaning agents.

In contrast, vinegar and water is often used for its acidic properties to break down dirt and oils, while alcohol swabs involve the use of isopropyl alcohol, which is a chemical disinfectant. Commercial nail cleansers typically contain a variety of chemical ingredients designed to dissolve nail polish or cleanse the nails effectively. Thus, the natural scrub stands out as a safe, non-chemical alternative that harnesses the benefits of natural ingredients for nail hygiene.