Final answer:
Fiber is an indigestible carbohydrate that aids in regular bowel movements, regulates blood glucose, and helps remove excess cholesterol, thus contributing to digestive health and potentially reducing the risk of colon cancer.
Step-by-step explanation:
Fiber is a type of carbohydrate that is essential for a healthy diet. Despite being a carbohydrate, fiber is unique because it is indigestible by human enzymes and thus does not provide energy in the form of calories. Instead, fiber plays critical roles in the body such as promoting regular bowel movements by adding bulk to the stool, regulating blood glucose levels, and aiding in the removal of excess cholesterol from the body. High-fiber foods include vegetables, fruits, and whole grains, which can enhance the feeling of fullness and support digestive health. Moreover, a diet rich in fiber has been associated with a lower risk of developing conditions like colon cancer.