Hello, learner! In today's exciting chapter, we will unravel Polymorphism, a prominent feature of Object-Oriented Programming (OOP). Specifically, we will study its role in maintaining backward compatibility while introducing new features. Think of it as a software update that introduces new functions without breaking the older functionality — ingenious, isn't it?

Polymorphism, a principle that derives from the Greek words 'poly' (many) and 'morphism' (forms), enables a variable or method to assume multiple roles — to embody various behaviors or functions determined by its data type or class.

Consider a class Bird with a method canFly(). If we create subclasses like Sparrow, Penguin, and Ostrich, we can override the canFly() method for certain subclasses. This demonstrates polymorphism in action.