Which of the following is true about polymorphism?

Polymorphism is a key concept in object-oriented programming that allows methods to operate differently depending on the object that is invoking them. This means that a single method name can call different implementations based on the object's class type. For instance, if a method is defined in a superclass and overridden in subclass, invoking this method on an object of the subclass will result in the subclass's version of the method being executed. This ability to call the correct method based on the object's type is what makes polymorphism a powerful tool for achieving dynamic behavior and flexibility in code, facilitating code reuse and reducing complexity.

In contrast, the other options do not accurately represent the definition or functionality of polymorphism in programming.