What is the term for a set of files called a library that can be referred to in your code?

The correct term for a set of files called a library that can be referred to in your code is referred to as an "Include." In programming, especially in languages such as PHP and C, "include" is a commonly used directive that allows developers to incorporate the contents of one file into another. This is useful for reusing code, managing libraries, and organizing files effectively. By including a library, a developer can utilize predefined functions, classes, or resources without having to rewrite that code, thereby enhancing code maintainability and efficiency.

Since this option emphasizes the concept of integrating a library into your codebase through an "include," it directly connects to the practical application of working with libraries in programming. It’s important to note that other choices, while related to programming concepts, do not define a set of files in the same way. A module may refer to a broader concept of encapsulation in programming, a framework typically refers to a larger structure that includes libraries, and a directory is more about file organization within a file system rather than a coding directive.