What is meant by the term 'object reference' in Python?

The term 'object reference' in Python refers specifically to the name linked to an instance of a class. When you create an object (or an instance) of a class, a reference is created that allows you to interact with that object. This reference acts as a pointer to the actual memory location where the object is stored, allowing you to access its attributes and methods.

For instance, if you have a class called Car and you create an instance with the name my_car, the variable my_car serves as an object reference to that specific instance of Car. This means when you use my_car, you are using the reference to interact with the object itself.

Other concepts mentioned in the options relate to aspects of variables and types in Python, but they do not capture the essence of what an 'object reference' is specifically meant to convey. The identifier for a class or the memory address of a variable pertains more to definitions and memory management, while variable types are about the kind of data a variable can hold. Each of these points serves distinct roles but does not define the core meaning of an object reference in programming with Python.