What role does the stomach play in decontaminating incoming food materials?

The stomach aids in the decontamination of incoming food materials by releasing chyme, an acidic fluid that is combined with enzymes and food and passed to the small intestine. This acidic fluid kills bacteria and strips the proteins to allow for absorption by the small intestines.

Your answer is water because there is combined mass of water found on, under, and over the surface of a planet. your answer is water.