Which of the following is NOT true about functions? They go below the main program in the source code file. They do a single task - like a mini program. They are a collection of commands that are given a name. Their name describes what they do.

First-line i.e, "They go below the main program in the source code file" is the correct answer.

Explanation:

A method is a set of instruction, that can be used in a program whenever we need, it can be divided into two parts user define and built-in. In user define method three-point are very important, that are method definition, declaration, and calling.  

plot immersion i am not fully sure with it though