What are the characteristics of a Python dictionary?

Question :

What are the characteristics of a Python dictionary?

The characteristics of a Python dictionary are as follows:
(a) A dictionary is an unordered collection of objects.
(b) Values are accessed using a key rather than an ordinal numeric index.
(c) The dictionary can shrink or grow as needed.
(d) It can be nested.
(e) The contents of dictionaries can be modified.