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

Question

The airtight seal will help prevent decay of the metal due to air exposure.
The conservationist is overly protective of this special piece.
The conservationist worries that visitors will breathe on the piece.
The glass case is designed to accent the silver sculpture.

Answer 1

The most appropriate reason for the conservationist to advise placing the silver sculpture in a glass case is:

The airtight seal will help prevent decay of the metal due to air exposure.

Silver can tarnish when exposed to air, moisture, and certain pollutants. A glass case would help protect the sculpture from these environmental factors, preserving its appearance and integrity over time.