Which statement best explains the difference between the main idea and supporting details?

Which statement best explains the difference between the main idea and supporting details?

• A. Details are the central point; the main idea explains them.
• B. The main idea is the central point; details support and explain it.
• C. The main idea is just one example among many details.
• D. Details are always opinions, not facts.

Answer: (B)

The big idea is the overall point the author wants you to understand, and the details are the facts, examples, reasons, and descriptions that back up that point and help you see why it’s true. The statement that the main idea is the central point and that details support and explain it expresses that relationship clearly. The other options mix up roles or mischaracterize what details are—main ideas aren’t just one example, and details aren’t always opinions; they can be facts, explanations, or examples.

The big idea is the overall point the author wants you to understand, and the details are the facts, examples, reasons, and descriptions that back up that point and help you see why it’s true. The statement that the main idea is the central point and that details support and explain it expresses that relationship clearly. The other options mix up roles or mischaracterize what details are—main ideas aren’t just one example, and details aren’t always opinions; they can be facts, explanations, or examples.