The type of carbohydrate that is useful in moving waste through the body system is:

The type of carbohydrate that is useful in moving waste through the body system is FIBER.  Fiber is a type of carbohydrate that passes through the body undigested.
Fiber is very important to be part of the diet because it helps regulate the body’s use of sugars, helps to keep hunger and blood sugar in check.
Children and adults need at least 20 to 30 grams of fiber per day for good health
Dietary fibers are found in fruits, vegetables and whole grains. 

Reproduction i think

This movement is also referred to as  glacial plucking