Final answer:
Eating more whole-grain bread is beneficial for Mia because whole grains contain more dietary fiber, which aids digestion and helps alleviate constipation.
Step-by-step explanation:
Harper's advice to Mia to eat more whole-grain bread is indeed beneficial. Whole grains are richer in dietary fiber compared to refined grains which helps in promoting a healthy digestive system. The fiber acts to increase the bulk of stool and facilitate its passage through the intestines, which can help alleviate constipation or difficulty with bowel movements that Mia has been experiencing.
Moreover, whole grains contain essential nutrients and contribute to a balanced diet, supporting overall health beyond just digestion. It is important for Mia to include a variety of whole grains in her diet such as whole wheat bread, brown rice, and whole wheat pasta, as they can help maintain digestive health and prevent gastrointestinal distress.