Answer:-

Polymers can be classified as natural or synthetic based on their origin and production methods. Here’s a classification of the given polymers:

Natural Polymers:

1. Cellulose (a)
2. Starch (d)
3. Protein (e)

Synthetic Polymers:

1. Polystyrene (b)
2. Terylene (c)
3. Silicones (f)
4. Orlon (Polyacrylonitrile) (g)
5. Phenol-formaldehyde resins (h)

Natural polymers are derived from natural sources, such as plants or animals, while synthetic polymers are chemically synthesized in laboratories or industries.