TypeScript for Beginners - Introduction - Polymorphism

The video tutorial explains polymorphism in object-oriented programming (OOP). It describes how a parent class variable can hold objects of its child classes, such as student, employee, and trainer. Each child class has a unique work method, and invoking the work method through the parent class variable calls the appropriate method based on the object type. This demonstrates polymorphism, where the same reference can point to different child class instances and invoke specific behaviors.

What is the significance of the statement 'the same object reference which is of type parent can hold on to different child classes instances'?

How does polymorphism allow for different behaviors based on the object type?