What is polymorphism?

for shape in [Circle(2), Square(3)]:
    print(shape.area())

A class that has many attributes and many methods inside
The same call works on different types, each running its own code (Correct option)
Changing the type of a variable while the program runs
Copying one method into many classes of the same program

The same call (shape.area()) works on different types, each running its own version

Polymorphism means 'many forms': different classes offer the same method name, and the caller does not need to know which class it has.

The loop calls area() on each shape; Circle and Square each compute it their own way.

This removes long if/elif chains that check the type.

Same method name, different behavior per class.