Final answer:
The correct answer is option 1. Soluble fiber is the type of dietary fiber that helps lower cholesterol levels and is found in foods like oats, peas, beans, and apples.
Step-by-step explanation:
The type of fiber believed to help lower cholesterol levels is soluble fiber. Soluble fiber dissolves in water to form a gel-like substance in the gastrointestinal tract, which can lead to a reduction in blood cholesterol levels. It works by thickening and slowing the movement of chyme through the small intestine, impacting the absorption of glucose and potentially reducing the risk of type 2 diabetes. Foods rich in soluble fiber include whole oats, peas, beans, and apples. While both soluble and insoluble fibers offer health benefits, it is the soluble type that is specifically associated with cholesterol management. Consuming a balanced diet with adequate soluble fiber is an important factor in maintaining cardiovascular health.
Fiber supplements are also available to help increase one's fiber intake, but it is generally preferred to get fiber from natural food sources due to additional nutrients they provide. It is worth noting that while they may also have health benefits, supplements should never replace a varied and balanced diet.
The correct option in the final answer is 1) Soluble fiber.