In a passage, which of the following best identifies the role of supporting details?

• A. The main idea.
• B. Who, what, when, and where.
• C. The author’s tone.
• D. The conclusion.

Answer: (B)

Supporting details flesh out the main point by providing concrete information. They give you specifics about who is involved, what happened, when it occurred, and where it took place. These elements anchor the central idea in real context, making the point clearer and more believable by offering evidence, examples, and descriptions. Without such specifics, the main idea could feel abstract; with them, you see how the idea plays out in real situations.

The main idea is the central point the author wants you to take away, the author’s tone is about their attitude toward the subject, and a conclusion is the final takeaway. Among these, the role of supporting details is to supply those who, what, when, and where details that illuminate and substantiate the main point.