Final answer:
When a Throttle variable called control is declared without creating a throttle, it should be assigned a null value, which indicates control does not point to any Throttle object.
Step-by-step explanation:
When a method in a program declares a Throttle variable called control but the throttle object has not yet been created, it is common practice to assign a null value to the control. This indicates that control is not currently pointing to any Throttle object. In languages such as Java or C#, if you declare a variable for an object and do not instantiate it with a new object, you should initialize the variable as null to avoid compile-time errors and to make it clear that it is intended to reference an object that has not yet been instantiated