_____ is an instruction format that illustrates a task using pictures.

A flowchart

A diagram

A paragraph

An if-then table

A flowchart

A diagram is an instruction format that illustrates a task using pictures.

The correct answer is a flowchart. A flowchart is an instruction format that uses a series of symbols and shapes to represent different steps and actions in a task. It provides a visual representation of a process or procedure, using various shapes such as rectangles, diamonds, arrows, and circles. Each shape represents a specific action or decision, and arrows are used to show the flow or sequence of steps. By following the flowchart from start to finish, you can easily understand and interpret the instructions being conveyed. Flowcharts are commonly used in computer programming, project management, decision analysis, and other fields where complex processes need to be visually represented.