Consider the writing prompt. Write an informative, research-based essay that explains the main causes and effects of the Korean War. Which research source is both a secondary source and a source that would be relevant to the prompt?

A secondary source interprets or summarizes events after they happen, rather than offering a firsthand account. A contemporary historian’s book about the Korean War is a secondary source and is directly relevant because it can explain the war’s causes and effects. The eyewitness interview and Truman’s speech are primary sources, while the encyclopedia entry focuses on regional geography rather than the war’s causes and effects.

AI-written and checked against the verified answer.