To answer this question, you need to understand that reserved words in programming languages are words that are reserved for specific purposes and cannot be used as identifiers (such as variable names or function names). In Java, there are several reserved words.
Let's go through each option to understand why it is correct or incorrect:
Option A) method - This option is incorrect because "method" is not a reserved word in the Java programming language. It is a term used to describe a function or procedure that is associated with an object or class.
Option B) native - This option is correct because "native" is a reserved word in the Java programming language. It is used to indicate that a method is implemented in a language other than Java, such as C or C++.
Option C) subclasses - This option is incorrect because "subclasses" is not a reserved word in the Java programming language. It is a term used to describe classes that inherit properties and methods from a superclass.
Option D) reference - This option is incorrect because "reference" is not a reserved word in the Java programming language. It is a term used to describe a variable that holds the memory address of an object.
The correct answer is B) native. This option is correct because "native" is a reserved word in the Java programming language.