Final answer:
Fiber is a type of complex carbohydrate that is partly indigestible. It helps in digestion, prevents constipation, and reduces the absorption of cholesterol in the blood.
Step-by-step explanation:
Fiber is a type of large, complex carbohydrate that is partly indigestible. Unlike sugars and starches, fiber does not provide energy. However, it has other important roles in the body. For example, fiber is important for maintaining the health of your gastrointestinal tract. Eating foods high in fiber also helps fill you up without providing too many calories. Most fruits and vegetables are high in fiber.
Fiber is found in roots, stems, leaves, nuts, and seed coverings of vegetables, fruits, and whole grains. It provides bulk for the muscles of the digestive tract to squeeze against, helping to speed the passage of food through the digestive system. Fiber also acts like a sponge, holding onto unhealthy substances in food to prevent them from being absorbed into the body. One example of an unhealthy substance is cholesterol. Fiber reduces the absorption of cholesterol into the bloodstream and lowers the chances of getting colon cancer. Therefore, statement 3) 'Fiber helps in digestion and prevents constipation' is true regarding fiber.