Which food is a rich source of fiber?

a. honey

b. corn oil margarine

c. whole-wheat bread

d. farm-raised salmon?

The appropriate answer is c. whole-wheat bread. Honey is a rich source of carbohydrate and corn oil margarine is a good source of fats. Farm-raised salmon is a good source of protein. Whole wheat used to make bread is a plant derivative rich in cellulose which is the main component of fiber. Cellulose can only be found in plant cell walls.