(i) Yes, it is natural rubber (cts-1, 4-polyisoprene) is a secondary metabolite. It is extracted from the rubber tree (Hevea brasiliensis).
(ii) In the rubber tree, latex is produced in the highly specialised cells, called laticifers in phloem.
(iii) Rubber is a terpenoid and due to its high tensile strength, elasticity and plasticity properties. It is widely used in industries.
(iv) It is a polymeric substance.