Which one of these is more elastic, steel or rubber ? Why ?

Which is more elastic, steel or rubber? Why?

The property of a body by virtue of which it tends to regain its original configuration as soon as the deforming forces applied on the body are removed is called elasticity. Coefficient of elasticity, E = (stress)/("strain") = (F//a)/(Delta l//l) = (F l)/(pi r^2(Delta l)) The value of E depends upon nature of material. A material with higher value of E is said to be more elastic. Read the above passage and answer the following question : (i) Which is more elastic steel or rubber ? Why ?

Why steel is more elastic than rubber ?

Which one is more elastic- steel or diamond?

Which one is more elastic, steel or plastic ? Why ?