__________ is a program development tool used for specifying program logic.

A program development tool used for specifying program logic must visually represent the sequence of operations, decisions, and loops in a program. DFD (Data Flow Diagram) is used to model the flow of data between processes, external entities, and data stores. It does not show the internal logic or sequence of operations within a program. Structure Chart shows the hierarchical structure of a program, breaking it into modules. It focuses on module relationships, not the logic within each module. Program Flow Chart uses standardized symbols (like ovals for start/end, rectangles for processes, diamonds for decisions) to represent the step-by-step logic of a program. This makes it ideal for specifying program logic. Fourth Generation Language Tools (4GL Tools) are high-level programming languages that allow developers to write code using natural language-like syntax. They are not tools for visually specifying logic. Therefore, the correct tool for specifying program logic is the Program Flow Chart.