Answer:
I think the best fit for this would be Break points
Step-by-step explanation:
Break points are useful for debugging a program. When line the break point is on executes, it pauses the program. In most IDEs it will show the call stack, all local variables, and other debug information, with break points you can step through your code to determine what is going on. Some IDEs have conditional break points where the break point only executes if the condition is true.
The technique for locating the source of an error is to set up Break points, which are locations where the browser will pause the program, allowing the programmer to determine the error at that position.