How is a method defined within an object constructor?

A method within an object constructor is defined as a key-value pair, where the key is the method name and the value is a function. This allows for the encapsulation of functionality within an object. When an object is created using a constructor, the methods defined in this way can be called on instances of that object.

For example, within a constructor function, you might define a method like this:

function MyObject() {

this.myMethod = function() {

// method functionality

};

}

In this instance, myMethod serves as the key, and the function assigned to it serves as the value. This structure is essential for organizing code in a way that takes advantage of object-oriented programming principles, making it clear that the function is intended to operate on the instance of the object.

The other choices do not accurately reflect the syntax used to create methods within an object constructor, which is why they aren't correct.