Cellulosic fibers are derived from what type of source?

Cellulosic fibers are primarily derived from plant sources, which is why the correct choice is associated with plants. These fibers are formed from cellulose, a complex carbohydrate that constitutes the main structural component of plant cell walls. Common examples of cellulosic fibers include cotton, linen (from flax), and rayon (which is manufactured from regenerated cellulose).

In contrast, fibers derived from animals, such as wool or silk, do not belong to the cellulosic category as they are protein-based. Mineral sources typically refer to inorganic fibers such as asbestos, which also do not contain cellulose. Synthetic materials include fibers like polyester and nylon, which are man-made and not derived from natural sources like plants. Thus, understanding that cellulosic fibers originate from plants helps clarify their characteristics and classifications in the context of fiber types and their cleaning requirements.