In which video format is each line of the frame displayed sequentially?

Progressive scanning is characterized by the way it displays video frames. In this format, each line of a frame is drawn in sequential order, from the top of the frame to the bottom. This method results in smoother motion and improved image quality, particularly during fast-moving scenes, as every line is presented in a complete frame at once.

In contrast, interlaced video displays alternatively, where it transmits only every other line of the frame in one pass (the odd lines), and then the remaining lines (the even lines) in the next pass. This can create noticeable flickering and a decrease in image clarity, particularly in high-motion situations. Frame rate pertains to how many frames per second are displayed, which can apply to both progressive and interlaced video but does not describe the scanning method itself. Digital video is a broad term that encompasses various formats and does not specifically refer to the sequential display of lines. Therefore, progressive scanning is distinctly the correct answer when identifying a format where each line is displayed sequentially, leading to clearer and more visually appealing video playback.