Which graphic organizer would best help you list a main idea with supporting details?

• A. Venn diagram.
• B. Outline or web map.
• C. Timeline.
• D. Flowchart.

Answer: (B)

Organizing a main idea with supporting details needs a structure that places the central idea at the top and branches into specifics. An outline or web map provides that hierarchical structure. In an outline, the main idea sits as a central point with indented lines for supporting details, examples, and evidence, making relationships among ideas clear and easy to expand. A web map, or mind map, centers on the main idea and radiates connected subtopics, which is great for capturing supporting details as you brainstorm.

A Venn diagram is used to compare and contrast items, showing shared and unique features rather than a single main idea with its details. A timeline arranges events in chronological order, highlighting sequence rather than hierarchical detail. A flowchart maps steps in a process, showing decisions and actions in order; it’s about processes, not listing a main idea with its details.

So the outline or web map is the best fit for listing a main idea with supporting details.