Which of the following an operations alters the state of an object?*1 pointselectorConstructorDestructormodifier

The operation that alters the state of an object is the "modifier". Here's why:

1. Selector: A selector is a method used to select a specific attribute of an object. It does not change the state of the object, it only retrieves or 'selects' data.

2. Constructor: A constructor is a special method used to initialize a newly created object. It sets the initial state of an object, but it does not alter the state of an existing object.

3. Destructor: A destructor is a special method that is invoked when an object is being deleted or goes out of scope. It is used to clean up resources the object may have acquired during its lifetime. Like the constructor, it does not alter the state of an existing object.

4. Modifier: A modifier is a method that changes the state of an object. It 'modifies' the object's attributes or data members, hence altering the state of the object.

So, the correct answer is "modifier".