Which of these substances contributes to soap's slippery texture?

B. a base

The fatty acids and glycerol contributes to soap's slippery texture.

Explanation:

What we need to know is that every oil has a specific index for strength, cleaning, etc. All of them are determined by the amount of certain fatty acid in the oil. When we make soap, what we need to know is that oil has a special role to play in that soap. So for example some of those oils are used to make bubble soap or creamy soap. On the other side, there are some oils which are giving strength to soap.