What is the difference between class$-$based and function$-$based views in Django?

Question $3$ options:

$1)$

A class$-$based view provides more flexibility and code reusability, while a function$-$based view is simpler and easier to use

$2)$

A class$-$based view is written in Python, while a function$-$based view is written in JavaScript

$3)$

There is no difference between a class$-$based view and a function$-$based view in Django