Write a usage example for an unfamiliar C++ class

Instead of an algorithm, you get a short C++ class you have never seen that owns a resource. Write a small program that shows how the class is meant to be used, then explain what happens at each step: construction and destruction, copying versus moving, who owns the resource when, and what would go wrong if it were misused. An AI assistant may be used while writing; the explanation is what is being judged.