Concept:The property of a material to return to its original shape or size after the deforming force is removed is called elasticity.
Explanation:When a stress is applied to a material, it gets stretched or deformed from its original form.
After the stress is removed, an elastic material fully recovers its original shape and dimensions.
This recovery occurs because the internal structure of the material can store and release energy without permanent deformation.
Common examples of elastic materials include rubber bands and metal springs.
In contrast, plastic materials remain deformed even after the stress is removed.
Elastomers and thermoplastics are specific types of polymers, not the general name for this property.
Therefore, materials that can be stretched and still return to their original forms when the stresses are removed are said to be elastic.
Answer:A. elastic