Final answer:
Fruits and vegetables, whole grains, and legumes are excellent sources of fiber that can help clean the digestive tract.
Step-by-step explanation:
Fruits and vegetables, whole grains, and legumes are all excellent sources of dietary fiber. These foods can help increase fiber intake and promote regular cleaning of the digestive tract.
Dietary fiber cannot be broken down and absorbed by the digestive system, so it passes through the gastrointestinal tract relatively unchanged and helps maintain a healthy digestive system.
Consuming enough fiber from these food sources can contribute to a decreased risk of various health conditions, including coronary heart disease, colon cancer, and type 2 diabetes.