About question posted in review session

hello, I am reading the content in the following link:
In the practice session, there is a good question:

  • What happens if you invoke the function’s argument?

first question, which function does the question refer to? Second from my understanding , function argument are the function and the parameter. Am I correct? So if we invoke the function arguments, it will what?

A parameter is the variable listed inside the parentheses in the function definition. An argument is the value that is sent to the function when it is called .
(language agnostic - What's the difference between an argument and a parameter? - Stack Overflow)

In my example , the callback function are the argument. Is this what the question refer to?

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