Pamela has started to take antibiotics, which kills most of the helpful and harmful bacteria in her body. Her doctor suggested she eat yogurt containing helpful bacteria to reestablish the bacteria in her digestive tract. Why is this important?

Helpful bacteria in the large intestine make certain vitamins that the body can use, so replacing them after antibiotics is beneficial. This matches choice B, “Bacteria that live in the large intestine provide some vitamins to people.” Chyme is formed in the stomach, and water reabsorption is mainly performed by the large intestine itself, not by its bacteria.

AI-written and checked against the verified answer.