Final answer:
Companies often send their fiber to plants with high cellulose content such as cotton or wood, which are then used in textile and paper product manufacturing. Cellulose is the key component of plant cell walls, and fiber is essential for a healthy diet.
Step-by-step explanation:
The plant fibers that companies frequently send to for further processing come from various sources. Cellulose serves as the primary component of plant cell walls and is integral in the production of fiber used in textiles and paper products.
Additionally, dietary fibers, such as those found in foods like grains and legumes, are not digestible by humans but play a crucial role in promoting a healthy digestive system and providing health benefits, like reducing the risk of heart disease. This fiber derived from plant sources is vital in maintaining a balanced diet, particularly as it counteracts the effects of a diet rich in processed foods.