<prompt> The modulus of elasticity is defined as:The stress at the proportional LimitThe strain at the proportional limitThe stress to strain ratio within the proportional limitNone of the above  <response>: Modulus OF ElasticityIt is also referred to as elastic modulus or Youngs modulus. It represents the relative stiffness or dity of the material within the elastic range. Youngs modulus is the ratio of stress to strain. Since stress is proportional to strain up to the proportional limit, the stress to strain ratio would be constant.Modulus of elasticityorYoungs modulus 