A museum curator set a silver sculpture on an exhibit table. Why would the conservationist advise him to instead place it in a glass case

A conservationist would advise placing the silver sculpture in a glass case to protect it from environmental factors that could potentially damage it. Silver is a metal that is susceptible to tarnishing and corrosion when exposed to elements such as humidity, air pollution, and direct contact with skin oils. Placing the sculpture in a glass case would help to create a controlled environment with stable humidity levels and minimal exposure to pollutants, thus ensuring the longevity and preservation of the artwork. Additionally, a glass case would also provide physical protection from potential damage or theft.