The answer is below.
Work Step by Step
Because all data are objects in Python, a variable for an object is actually a reference to the object. When you invoke a function with arguments, the reference value of each argument is passed to the parameter. This is referred to as pass-by-value in programming terminology. For simplicity, we say that the value of an argument is passed to a parameter when invoking a function. The value is actually a reference value to the object.