In the function myFunc, if the argument passed is an array, what happens to the actual array in main?

When an array is passed to a function in languages like C or C++, what occurs is that a reference to the original array is passed, rather than a copy of it. This means that the function can modify the elements of the array directly, affecting the original data stored in memory. Consequently, any changes made within the function to the array will be reflected in the array that was passed from the main function.

This behavior is due to how arrays are handled in these programming languages, where the name of the array acts as a pointer to the first element. Therefore, when the function operates on the array, it does so by manipulating the actual array's data in the memory where it resides.

While various properties regarding arrays, such as their size being fixed, may apply, the critical aspect here is the modification aspect. Hence, if the argument passed to the function is an array, it is indeed modified directly, which aligns with the correct choice.