In object$-$oriented programming languages, one class may be derived from another class.$$ For example, given an employee class we can derive a professor class, a student assistant class, or a staff class.$$ Each of these derived classes can take on the characteristics of the employee class and then add its own additional characteristics.$$ This feature of object$-$oriented languages is called

Question $33$ options:

modular design

polymorphism$$

encapsulation

inheritance$$

abstraction$$