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(B) The Young's modulus of elasticity $(Y)$ is a measure of the stiffness of a material. When the temperature of a solid increases,the thermal energy

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decreases

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(B) The Young's modulus of elasticity $(Y)$ is a measure of the stiffness of a material. When the temperature of a solid increases,the thermal energy of the atoms increases,causing the interatomic bonds to weaken. As the interatomic forces decrease,the material becomes less stiff,which leads to a decrease in the Young's modulus of elasticity. Therefore,with a rise in temperature,the Young's modulus of elasticity decreases.

With a rise in temperature,the Young's modulus of elasticity

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