what are the types of natural fibres?
['bast fibers such as jute, flax, hemp, ramie, and kenaf;', 'leaf fibers such as banana, sisal, agave, and pineapple;', 'seed fibers such as coir, cotton, and kapok;', 'core fibers such as kenaf, hemp, and jute;', 'grass and reed such as wheat, corn, and rice; and.']