Final answer:
In computer programming, a function is a code block that performs a single task (A) and often returns a value (B). Options C and D incorrectly define a function and are more related to variables and function arguments, respectively.
Step-by-step explanation:
When discussing a function in computer programming, it can be characterized by several attributes. Primarily, a function is:In computer programming, a function is a code block that performs a single task or a set of related tasks. It is a reusable piece of code that can be called and executed multiple times throughout the program. Functions can take parameters, which are data values passed into the function, and they can also return a value as the result of their execution.A - a code block that performs a single task: This means that the function is designed to carry out one specific operation, which helps in keeping the code organized and manageable.
B - a code block that returns a value: After a function has executed its defined task, it often returns a result or output, which can be used by other parts of the program.Options C and D do not properly define a function. Option C refers to a 'value that can be used anywhere in a code block,' which is more aligned with the definition of a variable, rather than a function. Option D mentions 'data in code that is passed into a parameter', which actually describes an argument that is passed to a function. Parameters are specific to functions, but they are not definitions of what a function is.