soaps feel slippery on our hands because they dissolve the oil on our skin, decreasing friction.this is…

Answer:

D. a base

Explanation:

Step1: Recall soap - oil interaction

Soap is effective in dissolving oil.

Step2: Understand chemical nature of soap

Soap is made by the saponification of fats or oils with a strong base. Bases have the property of reacting with oils and fats. They can break down the non - polar oil molecules and form an emulsion, which makes the oil easier to wash away. This process reduces the friction between the skin and other surfaces, making the soap feel slippery. Acids do not have this property of dissolving oils in the same way as bases. Neutral molecules and salt molecules do not have the ability to break down and dissolve oils effectively like bases do in the context of soap's action on skin oils.