What correction would fix the syntax error in the superman object?

The correct answer involves changing the syntax of the revealIdentity function to follow JavaScript's object method definition syntax. In JavaScript, when defining methods inside an object, the proper way to declare a function is by using the key name, a colon, followed by the function definition. This means that the format should be revealIdentity: function() { ... }.

By making this change, the method is correctly defined as a property of the object, allowing it to be called on instances of the object without any syntax issues. This correction maintains the intended functionality of the code while adhering to JavaScript's required syntax for methods within object literals.

Other options would not resolve the syntax error or would lead to other issues in the code structure. For instance, simply adding a semicolon after lastName does not address the fundamental issue of how the function is defined, and removing lastName entirely may disrupt the object's intended purpose. Changing the function keyword to 'func' does not comply with JavaScript conventions, as 'func' is not recognized as a valid keyword in this context.