Which term describes the logical flow of an algorithm or program?

The term that best describes the logical flow of an algorithm or program is a Control Structure. Control structures are essential components of any programming language, allowing developers to dictate the path of execution based on certain conditions. They include constructs such as loops (for, while), conditionals (if, switch), and branching mechanisms that determine how and when certain parts of code are executed.

Understanding control structures is vital for creating efficient algorithms and ensuring that programs behave as intended. They enable a designer to organize the program's logic coherently, making it easier to manage complex processes and enhance readability.

In contrast, the other terms do not encapsulate the concept of logical flow as effectively. A control function refers more to specific operations within the structure, while data validation pertains to ensuring that input data meets certain criteria before being processed. A data dictionary, on the other hand, is typically a reference that defines the structure of data used in the program rather than the flow of execution. Each of these terms serves a distinct purpose in software design, but only control structure accurately reflects the concept of directing the logical flow within an algorithm or program.