What does the command 'print(type(pytz))' return?

When you run the command print(type(pytz)), it returns the type of the pytz object, which is a module. In Python, every entity has a type, and modules are one of the fundamental building blocks used to structure larger programs. The pytz library specifically is used for working with time zones and is imported as a module. Therefore, when you check the type of this module with the type() function, it correctly identifies it as a module type.

In contrast, the other responses relate to types that don't apply in this context. A string type refers to sequences of characters, a datetime type pertains to objects that represent dates and times, and a list type is an ordered collection of items. Since pytz is a module, these other types do not correctly describe it, affirming that the only suitable answer is that it is a module type.