• Young's modulus is a mechanical characteristic of solids that determines the material's stiffness. It can also be described as the material's capacity to endure modifications to its shape as a result of expansion or compression.
• A material's Young's modulus is influenced by its temperature. 
• The atomic vibrations in the crystal structure also increase as a material's temperature rises. 
• The young's modulus of the material decreases as a result of the reduction in atomic forces.
• As a result, the value of Young's modulus of elasticity for a variety of material generally falls as temperature increases.

Hence the correct answer is decreases with increase in temperature .