What does a program process flow depict?

A program process flow is a visual representation that illustrates the sequence in which program statements are executed. This flow chart or diagram outlines the step-by-step progression of processes, detailing how the program moves from one operation to another. It captures the logic and decision points, showcasing how control is passed through different parts of the code based on specified conditions. Understanding this flow is essential for programming, debugging, and optimizing code since it provides clarity on how various components interact and function together within the program.

While the other options touch upon important aspects of software development, they do not specifically characterize a program process flow. The overall architecture of a software represents how different components and modules fit together but does not illustrate the step-by-step execution of code. Data flow across the system focuses on how data moves through various points but does not inherently detail the sequence of operations. User interface design pertains to the visual aspects of software that users interact with, rather than the underlying processing logic. Thus, the correct choice effectively emphasizes the sequential execution nature of program statements.