1. _________are words that a programming language has set aside for its own use ?Control words Control structures Reserved words Reserved keys

The correct answer is "Reserved words."

Reserved words (or keywords) are specific terms that a programming language has reserved for its own syntax or functionality. These words cannot be used as identifiers (such as variable names, function names, etc.) in the programming language because they are integral to the language's grammar and operation. Each programming language has its own set of reserved words, which are usually defined in the language's documentation. Examples of reserved words include "if," "else," "while," "for," and "class" in many programming languages like Java, C++, and Python. Understanding reserved words is crucial for anyone learning a new programming language, as improper use can lead to syntax errors or unexpected behavior in programs.