Concept:The United Nations was created to replace an earlier international body that failed to keep world peace.
Explanation:The League of Nations was formed after World War I to prevent future wars.
It proved ineffective because major powers were not fully committed, and it could not stop aggression leading to World War II.
After World War II, world leaders established the United Nations in 1945 to succeed the League.
The UN was designed with stronger structures for peacekeeping, international cooperation, and conflict resolution.
Therefore, the UN is the direct replacement for the League of Nations.
Answer:B. League of Nations