The stomach's own acid would start to damage its lining.

The correct answer is that the stomach's own acid would start to damage its lining.

• Reasoning: The primary role of mucus, as mentioned in the text, is to 'protects the stomach lining from the acid, preventing damage.' Without this protective layer, the corrosive acid would harm the stomach wall.
• Other Options:
  • Digestion would still occur, but it would be harmful to the stomach itself.
  • Churning is a muscular action, independent of mucus.
  • Killing bacteria is the job of the acid, which would still be present.

Ok