The Fission Theory: This theory proposes that the Moon was once part of the Earth and somehow separated from the Earth early in the history of the solar system.
When you actually use that class to make a THING, this is what you make. A method is a bit of code that can be called when needed (often as part of an class, but not always) Here's an example: I write a class called Ball. In my main code, I then write a=Ball.new, b=Ball.new, c=Ball.new.
The definition of a function occurs in languages such as Pascal, JavaScript, and C, while a method is defined in object-oriented languages, with the most common being Java and C#. Functions are called independently while an instance or object is used to call methods.