Which function allows Karel to remember a specific instruction set?

The function that allows Karel to remember a specific instruction set is defineFunction(). This function is crucial because it encapsulates a sequence of actions into a single callable entity, known as a function. When Karel uses defineFunction(), it defines a set of instructions that can be reused throughout the program without needing to rewrite the entire sequence every time it is needed. This feature not only promotes modularity but also enhances code readability and maintainability.

By defining functions, Karel can efficiently manage complex tasks by breaking them down into simpler, smaller components. When a function is defined, Karel retains that sequence in memory and can execute it whenever the function is called. This capability is vital for performing repetitive tasks or for organizing code logically, making it a foundational concept in programming. The alternative options, while suggesting manipulation or remembering actions, do not accurately describe the formal process of defining and storing these specific instruction sets like defineFunction() does.