Which of the following needs to be done for a line of code to call on a specific object that does not exist?

Setting up an array creates a collection of elements, but it does not define a single, specific object that the code can call if it does not already exist.

Removing all constants would remove fixed values, which is unrelated to defining a non-existent object for a line of code to call.

Setting up a loop is used for repetitive execution of code and does not define a new, non-existent object for a line of code to reference.

In programming, if a line of code attempts to call an object that hasn't been created or recognized by the program, it must first be defined. This typically involves declaring a variable that can hold a reference to an instance of that object's class, allowing the object to be created and then referenced through that variable.