Which organizational structure arranges ideas based on physical space?

The correct choice is indeed the one that identifies spatial order as the organizational structure that arranges ideas based on physical space. This structure is particularly effective for descriptive writing, as it allows the writer to convey a sense of where objects or elements are located relative to one another. In spatial order, the arrangement follows the actual physical layout, guiding the reader through a scene or environment as they would experience it in reality.

For example, if a writer is describing a room, they might start from the entrance and move left to right, describing items in the order they appear, which helps the reader visualize the space more clearly.

In contrast, chronological order organizes ideas based on time; narrative order focuses on storytelling elements; and sequential order presents steps in a process or events in a specific series. Each of these structures serves different purposes and is used in contexts where time sequence or order of actions is more relevant than the physical layout being described.