Fiber is composed of long polysaccharide chains and offers many health benefits. match the definition with the type of fiber.

a part of plants consumed in food:
added to food and is the form in fiber supplements:
does not dissolve in water:
soluble and viscous (forms a gel when wet):

insoluble fiber
soluble fiber
functional fiber
dietary fiber

•A part of plants consumed in food: Dietary fiber  

Dietary fibers are derived from plants and they cannot be completely broken down by digestive enzymes.

•Added to food and is the form in fiber supplements: Functional fiber

Functional fibers are usually nondigestible forms of carbohydrate extracted from starchy food.

•Does not dissolve in water: Insoluble fiber

Insoulubile fibers are  inert to digestive enzymes   and they cause bulking.

•Soluble and viscous (forms a gel when wet): Soluble fiber

Solubile fibers (also called prebiotic fibers) are fermented in the colon into gases.