What type of polymer the natural rubber is?

Step-by-step solution

Natural rubber is an addition polymer of isoprene (2-methyl-1,3-butadiene). It has weak intermolecular forces of attraction (van der Waals forces) between its polymer chains, which permit the polymer to be stretched. A few cross-links are introduced between the chains, which help the polymer retract to its original position after the force is released. Polymers with such elastic properties are classified as elastomers. Therefore, natural rubber is an elastomer. Answer: Elastomer