The following passage describes how Sam makes soap from coconut oil. Select the part of the passage that...

The following passage describes how Sam makes soap from coconut oil. Select the part of the passage that describes the chemical change that occurs during saponification.
To make her soap, Sam first heats the coconut oil to 120°F. Then, she adds the hot coconut oil to a solution of sodium hydroxide in water and starts to blend the mixture. As she blends, soap begins to form, causing the mixture to become much thicker. After blending for five minutes, Sam pours the mixture into a rectangular soap mold. Finally, Sam taps the mold to remove any air bubbles that had been blended into the mixture.