What does the graph indicate about the relative acidity of the stomach and small intestine??

That the stomach is more acidic than the small intestine.

Explanation:

If i understand the graph correctly, the graph indicates that the stomach is relatively more acidic than the small intestine. This Is because the data for the stomach (the blue line) is at the left side of the x-axis, from 1 to 5, while the data for the small intestine (the orange line) is more to the right, meaning that the small intestine has a higher pH. The higher the pH, the lower the acidity. So since the stomach has a lower pH, it has a higher acidity.