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.
Let me explain the difference between the method and function. Method is used to for doing the things especially in a systematic way implies an orderly logical arrangement. The function is a self-contained block of statements that perform a coherent task of some kind.