If the sphincter allows any leakage from the stomach, some of this acid might move back into the esophagus, causing 1. Heartburn
2. Saliva
3. Constipation
4. Diarrhea

1, heartburn. Keep stomach acid in the stomach!

This is what i found on google “phytoplankton, tiny organisms that live in the ocean, are autotrophs. some types of bacteria are autotrophs. most autotrophs use a process called photosynthesis to make their food.” i hope this you for what your looking for