Final answer:
Pancreatic juice neutralizes the acidic nature of chyme by containing high levels of bicarbonate and enzymes.
Step-by-step explanation:
The acidic nature of chyme is neutralized by pancreatic juice. Pancreatic juice contains high levels of bicarbonate, an alkali that neutralizes the acid in chyme. Additionally, pancreatic juice contains enzymes that aid in the digestion of proteins and carbohydrates.