Question

why steel is more elastic than rubber

Answer 1

Elasticity is the property of material by virtue of which it regains its original size and shape.
 Eg: -- take a piece of steel wire and a thin rubber, the same diameter of the steel wire and apply the same load on both together. After removal of the load/force, you will observe that the length of the rubber will increase, but the length of the steel wire will not increase. This proves the above explanation.